Merge branch 'quilt/rr'

Conflicts:
	drivers/net/virtio_net.c
	drivers/net/wireless/libertas_tf/if_usb.c
	include/linux/mod_devicetable.h
	scripts/mod/file2alias.c

43 files changed, 1230 insertions, 677 deletions

diff --git a/Documentation/cpu-hotplug.txt b/Documentation/cpu-hotplug.txt
index a99d7031cdf9..45d5a217484f 100644
--- a/Documentation/cpu-hotplug.txt
+++ b/Documentation/cpu-hotplug.txt
@@ -2,7 +2,7 @@
 
 		Maintainers:
 		CPU Hotplug Core:
-			Rusty Russell <rusty@rustycorp.com.au>
+			Rusty Russell <rusty@rustcorp.com.au>
 			Srivatsa Vaddagiri <vatsa@in.ibm.com>
 		i386:
 			Zwane Mwaikambo <zwane@arm.linux.org.uk>
diff --git a/arch/um/drivers/hostaudio_kern.c b/arch/um/drivers/hostaudio_kern.c
index 368219cc2366..3ceede02f426 100644
--- a/arch/um/drivers/hostaudio_kern.c
+++ b/arch/um/drivers/hostaudio_kern.c
@@ -186,7 +186,9 @@ static int hostaudio_open(struct inode *inode, struct file *file)
 	int ret;
 
 #ifdef DEBUG
+	kparam_block_sysfs_write(dsp);
 	printk(KERN_DEBUG "hostaudio: open called (host: %s)\n", dsp);
+	kparam_unblock_sysfs_write(dsp);
 #endif
 
 	state = kmalloc(sizeof(struct hostaudio_state), GFP_KERNEL);
@@ -198,7 +200,9 @@ static int hostaudio_open(struct inode *inode, struct file *file)
 	if (file->f_mode & FMODE_WRITE)
 		w = 1;
 
+	kparam_block_sysfs_write(dsp);
 	ret = os_open_file(dsp, of_set_rw(OPENFLAGS(), r, w), 0);
+	kparam_unblock_sysfs_write(dsp);
 	if (ret < 0) {
 		kfree(state);
 		return ret;
@@ -254,11 +258,15 @@ static int hostmixer_open_mixdev(struct inode *inode, struct file *file)
 	if (file->f_mode & FMODE_WRITE)
 		w = 1;
 
+	kparam_block_sysfs_write(mixer);
 	ret = os_open_file(mixer, of_set_rw(OPENFLAGS(), r, w), 0);
+	kparam_unblock_sysfs_write(mixer);
 
 	if (ret < 0) {
+		kparam_block_sysfs_write(dsp);
 		printk(KERN_ERR "hostaudio_open_mixdev failed to open '%s', "
 		       "err = %d\n", dsp, -ret);
+		kparam_unblock_sysfs_write(dsp);
 		kfree(state);
 		return ret;
 	}
@@ -314,8 +322,10 @@ MODULE_LICENSE("GPL");
 
 static int __init hostaudio_init_module(void)
 {
+	__kernel_param_lock();
 	printk(KERN_INFO "UML Audio Relay (host dsp = %s, host mixer = %s)\n",
 	       dsp, mixer);
+	__kernel_param_unlock();
 
 	module_data.dev_audio = register_sound_dsp(&hostaudio_fops, -1);
 	if (module_data.dev_audio < 0) {
diff --git a/drivers/acpi/debug.c b/drivers/acpi/debug.c
index 146135e7a6a1..295dbfa2db9c 100644
--- a/drivers/acpi/debug.c
+++ b/drivers/acpi/debug.c
@@ -96,7 +96,8 @@ static const struct acpi_dlevel acpi_debug_levels[] = {
 /* --------------------------------------------------------------------------
                               FS Interface (/sys)
    -------------------------------------------------------------------------- */
-static int param_get_debug_layer(char *buffer, struct kernel_param *kp) {
+static int param_get_debug_layer(char *buffer, const struct kernel_param *kp)
+{
 	int result = 0;
 	int i;
 
@@ -118,7 +119,8 @@ static int param_get_debug_layer(char *buffer, struct kernel_param *kp) {
 	return result;
 }
 
-static int param_get_debug_level(char *buffer, struct kernel_param *kp) {
+static int param_get_debug_level(char *buffer, const struct kernel_param *kp)
+{
 	int result = 0;
 	int i;
 
@@ -137,8 +139,18 @@ static int param_get_debug_level(char *buffer, struct kernel_param *kp) {
 	return result;
 }
 
-module_param_call(debug_layer, param_set_uint, param_get_debug_layer, &acpi_dbg_layer, 0644);
-module_param_call(debug_level, param_set_uint, param_get_debug_level, &acpi_dbg_level, 0644);
+static struct kernel_param_ops acpi_debug_layer_ops = {
+	.set = param_set_uint,
+	.get = param_get_debug_layer,
+};
+
+static struct kernel_param_ops acpi_debug_level_ops = {
+	.set = param_set_uint,
+	.get = param_get_debug_level,
+};
+
+module_param_cb(debug_layer, &acpi_debug_layer_ops, &acpi_dbg_layer, 0644);
+module_param_cb(debug_level, &acpi_debug_level_ops, &acpi_dbg_level, 0644);
 
 static char trace_method_name[6];
 module_param_string(trace_method_name, trace_method_name, 6, 0644);
@@ -147,7 +159,7 @@ module_param(trace_debug_layer, uint, 0644);
 static unsigned int trace_debug_level;
 module_param(trace_debug_level, uint, 0644);
 
-static int param_set_trace_state(const char *val, struct kernel_param *kp)
+static int param_set_trace_state(const char *val, const struct kernel_param *kp)
 {
 	int result = 0;
 
@@ -181,7 +193,7 @@ exit:
 	return result;
 }
 
-static int param_get_trace_state(char *buffer, struct kernel_param *kp)
+static int param_get_trace_state(char *buffer, const struct kernel_param *kp)
 {
 	if (!acpi_gbl_trace_method_name)
 		return sprintf(buffer, "disable");
@@ -194,8 +206,12 @@ static int param_get_trace_state(char *buffer, struct kernel_param *kp)
 	return 0;
 }
 
-module_param_call(trace_state, param_set_trace_state, param_get_trace_state,
-		  NULL, 0644);
+static struct kernel_param_ops param_ops_trace_state = {
+	.set = param_set_trace_state,
+	.get = param_get_trace_state,
+};
+
+module_param_cb(trace_state, &param_ops_trace_state, NULL, 0644);
 
 /* --------------------------------------------------------------------------
 				DebugFS Interface
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 2138a7ae050c..135615607e71 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -50,7 +50,7 @@ static void blk_done(struct virtqueue *vq)
 	unsigned long flags;
 
 	spin_lock_irqsave(&vblk->lock, flags);
-	while ((vbr = vblk->vq->vq_ops->get_buf(vblk->vq, &len)) != NULL) {
+	while ((vbr = virtqueue_get_buf(vblk->vq, &len)) != NULL) {
 		int error;
 
 		switch (vbr->status) {
@@ -70,6 +70,8 @@ static void blk_done(struct virtqueue *vq)
 			vbr->req->sense_len = vbr->in_hdr.sense_len;
 			vbr->req->errors = vbr->in_hdr.errors;
 		}
+		if (blk_special_request(vbr->req))
+			vbr->req->errors = (error != 0);
 
 		__blk_end_request_all(vbr->req, error);
 		list_del(&vbr->list);
@@ -103,6 +105,11 @@ static bool do_req(struct request_queue *q, struct virtio_blk *vblk,
 		vbr->out_hdr.sector = 0;
 		vbr->out_hdr.ioprio = req_get_ioprio(vbr->req);
 		break;
+	case REQ_TYPE_SPECIAL:
+		vbr->out_hdr.type = VIRTIO_BLK_T_GET_ID;
+		vbr->out_hdr.sector = 0;
+		vbr->out_hdr.ioprio = req_get_ioprio(vbr->req);
+		break;
 	case REQ_TYPE_LINUX_BLOCK:
 		if (req->cmd[0] == REQ_LB_OP_FLUSH) {
 			vbr->out_hdr.type = VIRTIO_BLK_T_FLUSH;
@@ -151,7 +158,7 @@ static bool do_req(struct request_queue *q, struct virtio_blk *vblk,
 		}
 	}
 
-	if (vblk->vq->vq_ops->add_buf(vblk->vq, vblk->sg, out, in, vbr) < 0) {
+	if (virtqueue_add_buf(vblk->vq, vblk->sg, out, in, vbr) < 0) {
 		mempool_free(vbr, vblk->pool);
 		return false;
 	}
@@ -180,7 +187,7 @@ static void do_virtblk_request(struct request_queue *q)
 	}
 
 	if (issued)
-		vblk->vq->vq_ops->kick(vblk->vq);
+		virtqueue_kick(vblk->vq);
 }
 
 static void virtblk_prepare_flush(struct request_queue *q, struct request *req)
@@ -189,12 +196,45 @@ static void virtblk_prepare_flush(struct request_queue *q, struct request *req)
 	req->cmd[0] = REQ_LB_OP_FLUSH;
 }
 
+/* return id (s/n) string for *disk to *id_str
+ */
+static int virtblk_get_id(struct gendisk *disk, char *id_str)
+{
+	struct virtio_blk *vblk = disk->private_data;
+	struct request *req;
+	struct bio *bio;
+
+	bio = bio_map_kern(vblk->disk->queue, id_str, VIRTIO_BLK_ID_BYTES,
+			   GFP_KERNEL);
+	if (IS_ERR(bio))
+		return PTR_ERR(bio);
+
+	req = blk_make_request(vblk->disk->queue, bio, GFP_KERNEL);
+	if (IS_ERR(req)) {
+		bio_put(bio);
+		return PTR_ERR(req);
+	}
+
+	req->cmd_type = REQ_TYPE_SPECIAL;
+	return blk_execute_rq(vblk->disk->queue, vblk->disk, req, false);
+}
+
 static int virtblk_ioctl(struct block_device *bdev, fmode_t mode,
 			 unsigned cmd, unsigned long data)
 {
 	struct gendisk *disk = bdev->bd_disk;
 	struct virtio_blk *vblk = disk->private_data;
 
+	if (cmd == 'VBID') {
+		void __user *usr_data = (void __user *)data;
+		char id_str[VIRTIO_BLK_ID_BYTES];
+		int err;
+
+		err = virtblk_get_id(disk, id_str);
+		if (!err && copy_to_user(usr_data, id_str, VIRTIO_BLK_ID_BYTES))
+			err = -EFAULT;
+		return err;
+	}
 	/*
 	 * Only allow the generic SCSI ioctls if the host can support it.
 	 */
diff --git a/drivers/char/hvc_iucv.c b/drivers/char/hvc_iucv.c
index 5a80ad68ef22..7b01bc609de3 100644
--- a/drivers/char/hvc_iucv.c
+++ b/drivers/char/hvc_iucv.c
@@ -1149,7 +1149,7 @@ out_err:
  * Note: If it is called early in the boot process, @val is stored and
  *	 parsed later in hvc_iucv_init().
  */
-static int param_set_vmidfilter(const char *val, struct kernel_param *kp)
+static int param_set_vmidfilter(const char *val, const struct kernel_param *kp)
 {
 	int rc;
 
@@ -1176,7 +1176,7 @@ static int param_set_vmidfilter(const char *val, struct kernel_param *kp)
  * The function stores the filter as a comma-separated list of z/VM user IDs
  * in @buffer. Typically, sysfs routines call this function for attr show.
  */
-static int param_get_vmidfilter(char *buffer, struct kernel_param *kp)
+static int param_get_vmidfilter(char *buffer, const struct kernel_param *kp)
 {
 	int rc;
 	size_t index, len;
@@ -1203,6 +1203,11 @@ static int param_get_vmidfilter(char *buffer, struct kernel_param *kp)
 
 #define param_check_vmidfilter(name, p) __param_check(name, p, void)
 
+static struct kernel_param_ops param_ops_vmidfilter = {
+	.set = param_set_vmidfilter,
+	.get = param_get_vmidfilter,
+};
+
 /**
  * hvc_iucv_init() - z/VM IUCV HVC device driver initialization
  */
diff --git a/drivers/char/hw_random/virtio-rng.c b/drivers/char/hw_random/virtio-rng.c
index 64fe0a793efd..75f1cbd61c17 100644
--- a/drivers/char/hw_random/virtio-rng.c
+++ b/drivers/char/hw_random/virtio-rng.c
@@ -32,7 +32,7 @@ static bool busy;
 static void random_recv_done(struct virtqueue *vq)
 {
 	/* We can get spurious callbacks, e.g. shared IRQs + virtio_pci. */
-	if (!vq->vq_ops->get_buf(vq, &data_avail))
+	if (!virtqueue_get_buf(vq, &data_avail))
 		return;
 
 	complete(&have_data);
@@ -46,10 +46,10 @@ static void register_buffer(u8 *buf, size_t size)
 	sg_init_one(&sg, buf, size);
 
 	/* There should always be room for one buffer. */
-	if (vq->vq_ops->add_buf(vq, &sg, 0, 1, buf) < 0)
+	if (virtqueue_add_buf(vq, &sg, 0, 1, buf) < 0)
 		BUG();
 
-	vq->vq_ops->kick(vq);
+	virtqueue_kick(vq);
 }
 
 static int virtio_read(struct hwrng *rng, void *buf, size_t size, bool wait)
diff --git a/drivers/char/ipmi/ipmi_watchdog.c b/drivers/char/ipmi/ipmi_watchdog.c
index a4d57e31f713..45999d81004f 100644
--- a/drivers/char/ipmi/ipmi_watchdog.c
+++ b/drivers/char/ipmi/ipmi_watchdog.c
@@ -196,7 +196,7 @@ static void ipmi_unregister_watchdog(int ipmi_intf);
  */
 static int start_now;
 
-static int set_param_int(const char *val, struct kernel_param *kp)
+static int set_param_timeout(const char *val, const struct kernel_param *kp)
 {
 	char *endp;
 	int  l;
@@ -215,10 +215,11 @@ static int set_param_int(const char *val, struct kernel_param *kp)
 	return rv;
 }
 
-static int get_param_int(char *buffer, struct kernel_param *kp)
-{
-	return sprintf(buffer, "%i", *((int *)kp->arg));
-}
+static struct kernel_param_ops param_ops_timeout = {
+	.set = set_param_timeout,
+	.get = param_get_int,
+};
+#define param_check_timeout param_check_int
 
 typedef int (*action_fn)(const char *intval, char *outval);
 
@@ -227,7 +228,7 @@ static int preaction_op(const char *inval, char *outval);
 static int preop_op(const char *inval, char *outval);
 static void check_parms(void);
 
-static int set_param_str(const char *val, struct kernel_param *kp)
+static int set_param_str(const char *val, const struct kernel_param *kp)
 {
 	action_fn  fn = (action_fn) kp->arg;
 	int        rv = 0;
@@ -251,7 +252,7 @@ static int set_param_str(const char *val, struct kernel_param *kp)
 	return rv;
 }
 
-static int get_param_str(char *buffer, struct kernel_param *kp)
+static int get_param_str(char *buffer, const struct kernel_param *kp)
 {
 	action_fn fn = (action_fn) kp->arg;
 	int       rv;
@@ -263,7 +264,7 @@ static int get_param_str(char *buffer, struct kernel_param *kp)
 }
 
 
-static int set_param_wdog_ifnum(const char *val, struct kernel_param *kp)
+static int set_param_wdog_ifnum(const char *val, const struct kernel_param *kp)
 {
 	int rv = param_set_int(val, kp);
 	if (rv)
@@ -276,27 +277,38 @@ static int set_param_wdog_ifnum(const char *val, struct kernel_param *kp)
 	return 0;
 }
 
-module_param_call(ifnum_to_use, set_param_wdog_ifnum, get_param_int,
-		  &ifnum_to_use, 0644);
+static struct kernel_param_ops param_ops_wdog_ifnum = {
+	.set = set_param_wdog_ifnum,
+	.get = param_get_int,
+};
+
+#define param_check_wdog_ifnum param_check_int
+
+static struct kernel_param_ops param_ops_str = {
+	.set = set_param_str,
+	.get = get_param_str,
+};
+
+module_param(ifnum_to_use, wdog_ifnum, 0644);
 MODULE_PARM_DESC(ifnum_to_use, "The interface number to use for the watchdog "
 		 "timer.  Setting to -1 defaults to the first registered "
 		 "interface");
 
-module_param_call(timeout, set_param_int, get_param_int, &timeout, 0644);
+module_param(timeout, timeout, 0644);
 MODULE_PARM_DESC(timeout, "Timeout value in seconds.");
 
-module_param_call(pretimeout, set_param_int, get_param_int, &pretimeout, 0644);
+module_param(pretimeout, timeout, 0644);
 MODULE_PARM_DESC(pretimeout, "Pretimeout value in seconds.");
 
-module_param_call(action, set_param_str, get_param_str, action_op, 0644);
+module_param_cb(action, &param_ops_str, action_op, 0644);
 MODULE_PARM_DESC(action, "Timeout action. One of: "
 		 "reset, none, power_cycle, power_off.");
 
-module_param_call(preaction, set_param_str, get_param_str, preaction_op, 0644);
+module_param_cb(preaction, &param_ops_str, preaction_op, 0644);
 MODULE_PARM_DESC(preaction, "Pretimeout action.  One of: "
 		 "pre_none, pre_smi, pre_nmi, pre_int.");
 
-module_param_call(preop, set_param_str, get_param_str, preop_op, 0644);
+module_param_cb(preop, &param_ops_str, preop_op, 0644);
 MODULE_PARM_DESC(preop, "Pretimeout driver operation.  One of: "
 		 "preop_none, preop_panic, preop_give_data.");
 
diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index 196428c2287a..458d907e3621 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -33,35 +33,6 @@
 #include <linux/workqueue.h>
 #include "hvc_console.h"
 
-/* Moved here from .h file in order to disable MULTIPORT. */
-#define VIRTIO_CONSOLE_F_MULTIPORT 1	/* Does host provide multiple ports? */
-
-struct virtio_console_multiport_conf {
-	struct virtio_console_config config;
-	/* max. number of ports this device can hold */
-	__u32 max_nr_ports;
-	/* number of ports added so far */
-	__u32 nr_ports;
-} __attribute__((packed));
-
-/*
- * A message that's passed between the Host and the Guest for a
- * particular port.
- */
-struct virtio_console_control {
-	__u32 id;		/* Port number */
-	__u16 event;		/* The kind of control event (see below) */
-	__u16 value;		/* Extra information for the key */
-};
-
-/* Some events for control messages */
-#define VIRTIO_CONSOLE_PORT_READY	0
-#define VIRTIO_CONSOLE_CONSOLE_PORT	1
-#define VIRTIO_CONSOLE_RESIZE		2
-#define VIRTIO_CONSOLE_PORT_OPEN	3
-#define VIRTIO_CONSOLE_PORT_NAME	4
-#define VIRTIO_CONSOLE_PORT_REMOVE	5
-
 /*
  * This is a global struct for storing common data for all the devices
  * this driver handles.
@@ -107,6 +78,9 @@ struct console {
 	/* The hvc device associated with this console port */
 	struct hvc_struct *hvc;
 
+	/* The size of the console */
+	struct winsize ws;
+
 	/*
 	 * This number identifies the number that we used to register
 	 * with hvc in hvc_instantiate() and hvc_alloc(); this is the
@@ -139,7 +113,6 @@ struct ports_device {
 	 * notification
 	 */
 	struct work_struct control_work;
-	struct work_struct config_work;
 
 	struct list_head ports;
 
@@ -150,7 +123,7 @@ struct ports_device {
 	spinlock_t cvq_lock;
 
 	/* The current config space is stored here */
-	struct virtio_console_multiport_conf config;
+	struct virtio_console_config config;
 
 	/* The virtio device we're associated with */
 	struct virtio_device *vdev;
@@ -189,6 +162,9 @@ struct port {
 	 */
 	spinlock_t inbuf_lock;
 
+	/* Protect the operations on the out_vq. */
+	spinlock_t outvq_lock;
+
 	/* The IO vqs for this port */
 	struct virtqueue *in_vq, *out_vq;
 
@@ -214,6 +190,8 @@ struct port {
 	/* The 'id' to identify the port with the Host */
 	u32 id;
 
+	bool outvq_full;
+
 	/* Is the host device open */
 	bool host_connected;
 
@@ -328,7 +306,7 @@ static void *get_inbuf(struct port *port)
 	unsigned int len;
 
 	vq = port->in_vq;
-	buf = vq->vq_ops->get_buf(vq, &len);
+	buf = virtqueue_get_buf(vq, &len);
 	if (buf) {
 		buf->len = len;
 		buf->offset = 0;
@@ -349,8 +327,8 @@ static int add_inbuf(struct virtqueue *vq, struct port_buffer *buf)
 
 	sg_init_one(sg, buf->buf, buf->size);
 
-	ret = vq->vq_ops->add_buf(vq, sg, 0, 1, buf);
-	vq->vq_ops->kick(vq);
+	ret = virtqueue_add_buf(vq, sg, 0, 1, buf);
+	virtqueue_kick(vq);
 	return ret;
 }
 
@@ -366,7 +344,7 @@ static void discard_port_data(struct port *port)
 	if (port->inbuf)
 		buf = port->inbuf;
 	else
-		buf = vq->vq_ops->get_buf(vq, &len);
+		buf = virtqueue_get_buf(vq, &len);
 
 	ret = 0;
 	while (buf) {
@@ -374,7 +352,7 @@ static void discard_port_data(struct port *port)
 			ret++;
 			free_buf(buf);
 		}
-		buf = vq->vq_ops->get_buf(vq, &len);
+		buf = virtqueue_get_buf(vq, &len);
 	}
 	port->inbuf = NULL;
 	if (ret)
@@ -403,57 +381,96 @@ out:
 	return ret;
 }
 
-static ssize_t send_control_msg(struct port *port, unsigned int event,
-				unsigned int value)
+static ssize_t __send_control_msg(struct ports_device *portdev, u32 port_id,
+				  unsigned int event, unsigned int value)
 {
 	struct scatterlist sg[1];
 	struct virtio_console_control cpkt;
 	struct virtqueue *vq;
 	unsigned int len;
 
-	if (!use_multiport(port->portdev))
+	if (!use_multiport(portdev))
 		return 0;
 
-	cpkt.id = port->id;
+	cpkt.id = port_id;
 	cpkt.event = event;
 	cpkt.value = value;
 
-	vq = port->portdev->c_ovq;
+	vq = portdev->c_ovq;
 
 	sg_init_one(sg, &cpkt, sizeof(cpkt));
-	if (vq->vq_ops->add_buf(vq, sg, 1, 0, &cpkt) >= 0) {
-		vq->vq_ops->kick(vq);
-		while (!vq->vq_ops->get_buf(vq, &len))
+	if (virtqueue_add_buf(vq, sg, 1, 0, &cpkt) >= 0) {
+		virtqueue_kick(vq);
+		while (!virtqueue_get_buf(vq, &len))
 			cpu_relax();
 	}
 	return 0;
 }
 
-static ssize_t send_buf(struct port *port, void *in_buf, size_t in_count)
+static ssize_t send_control_msg(struct port *port, unsigned int event,
+				unsigned int value)
+{
+	return __send_control_msg(port->portdev, port->id, event, value);
+}
+
+/* Callers must take the port->outvq_lock */
+static void reclaim_consumed_buffers(struct port *port)
+{
+	void *buf;
+	unsigned int len;
+
+	while ((buf = virtqueue_get_buf(port->out_vq, &len))) {
+		kfree(buf);
+		port->outvq_full = false;
+	}
+}
+
+static ssize_t send_buf(struct port *port, void *in_buf, size_t in_count,
+			bool nonblock)
 {
 	struct scatterlist sg[1];
 	struct virtqueue *out_vq;
 	ssize_t ret;
+	unsigned long flags;
 	unsigned int len;
 
 	out_vq = port->out_vq;
 
+	spin_lock_irqsave(&port->outvq_lock, flags);
+
+	reclaim_consumed_buffers(port);
+
 	sg_init_one(sg, in_buf, in_count);
-	ret = out_vq->vq_ops->add_buf(out_vq, sg, 1, 0, in_buf);
+	ret = virtqueue_add_buf(out_vq, sg, 1, 0, in_buf);
 
 	/* Tell Host to go! */
-	out_vq->vq_ops->kick(out_vq);
+	virtqueue_kick(out_vq);
 
 	if (ret < 0) {
 		in_count = 0;
-		goto fail;
+		goto done;
 	}
 
-	/* Wait till the host acknowledges it pushed out the data we sent. */
-	while (!out_vq->vq_ops->get_buf(out_vq, &len))
+	if (ret == 0)
+		port->outvq_full = true;
+
+	if (nonblock)
+		goto done;
+
+	/*
+	 * Wait till the host acknowledges it pushed out the data we
+	 * sent.  This is done for ports in blocking mode or for data
+	 * from the hvc_console; the tty operations are performed with
+	 * spinlocks held so we can't sleep here.
+	 */
+	while (!virtqueue_get_buf(out_vq, &len))
 		cpu_relax();
-fail:
-	/* We're expected to return the amount of data we wrote */
+done:
+	spin_unlock_irqrestore(&port->outvq_lock, flags);
+	/*
+	 * We're expected to return the amount of data we wrote -- all
+	 * of it
+	 */
 	return in_count;
 }
 
@@ -503,9 +520,28 @@ static ssize_t fill_readbuf(struct port *port, char *out_buf, size_t out_count,
 }
 
 /* The condition that must be true for polling to end */
-static bool wait_is_over(struct port *port)
+static bool will_read_block(struct port *port)
+{
+	return !port_has_data(port) && port->host_connected;
+}
+
+static bool will_write_block(struct port *port)
 {
-	return port_has_data(port) || !port->host_connected;
+	bool ret;
+
+	if (!port->host_connected)
+		return true;
+
+	spin_lock_irq(&port->outvq_lock);
+	/*
+	 * Check if the Host has consumed any buffers since we last
+	 * sent data (this is only applicable for nonblocking ports).
+	 */
+	reclaim_consumed_buffers(port);
+	ret = port->outvq_full;
+	spin_unlock_irq(&port->outvq_lock);
+
+	return ret;
 }
 
 static ssize_t port_fops_read(struct file *filp, char __user *ubuf,
@@ -528,7 +564,7 @@ static ssize_t port_fops_read(struct file *filp, char __user *ubuf,
 			return -EAGAIN;
 
 		ret = wait_event_interruptible(port->waitqueue,
-					       wait_is_over(port));
+					       !will_read_block(port));
 		if (ret < 0)
 			return ret;
 	}
@@ -554,9 +590,22 @@ static ssize_t port_fops_write(struct file *filp, const char __user *ubuf,
 	struct port *port;
 	char *buf;
 	ssize_t ret;
+	bool nonblock;
 
 	port = filp->private_data;
 
+	nonblock = filp->f_flags & O_NONBLOCK;
+
+	if (will_write_block(port)) {
+		if (nonblock)
+			return -EAGAIN;
+
+		ret = wait_event_interruptible(port->waitqueue,
+					       !will_write_block(port));
+		if (ret < 0)
+			return ret;
+	}
+
 	count = min((size_t)(32 * 1024), count);
 
 	buf = kmalloc(count, GFP_KERNEL);
@@ -569,9 +618,14 @@ static ssize_t port_fops_write(struct file *filp, const char __user *ubuf,
 		goto free_buf;
 	}
 
-	ret = send_buf(port, buf, count);
+	ret = send_buf(port, buf, count, nonblock);
+
+	if (nonblock && ret > 0)
+		goto out;
+
 free_buf:
 	kfree(buf);
+out:
 	return ret;
 }
 
@@ -586,7 +640,7 @@ static unsigned int port_fops_poll(struct file *filp, poll_table *wait)
 	ret = 0;
 	if (port->inbuf)
 		ret |= POLLIN | POLLRDNORM;
-	if (port->host_connected)
+	if (!will_write_block(port))
 		ret |= POLLOUT;
 	if (!port->host_connected)
 		ret |= POLLHUP;
@@ -610,6 +664,10 @@ static int port_fops_release(struct inode *inode, struct file *filp)
 
 	spin_unlock_irq(&port->inbuf_lock);
 
+	spin_lock_irq(&port->outvq_lock);
+	reclaim_consumed_buffers(port);
+	spin_unlock_irq(&port->outvq_lock);
+
 	return 0;
 }
 
@@ -638,6 +696,15 @@ static int port_fops_open(struct inode *inode, struct file *filp)
 	port->guest_connected = true;
 	spin_unlock_irq(&port->inbuf_lock);
 
+	spin_lock_irq(&port->outvq_lock);
+	/*
+	 * There might be a chance that we missed reclaiming a few
+	 * buffers in the window of the port getting previously closed
+	 * and opening now.
+	 */
+	reclaim_consumed_buffers(port);
+	spin_unlock_irq(&port->outvq_lock);
+
 	/* Notify host of port being opened */
 	send_control_msg(filp->private_data, VIRTIO_CONSOLE_PORT_OPEN, 1);
 
@@ -676,9 +743,9 @@ static int put_chars(u32 vtermno, const char *buf, int count)
 
 	port = find_port_by_vtermno(vtermno);
 	if (!port)
-		return 0;
+		return -EPIPE;
 
-	return send_buf(port, (void *)buf, count);
+	return send_buf(port, (void *)buf, count, false);
 }
 
 /*
@@ -692,9 +759,13 @@ static int get_chars(u32 vtermno, char *buf, int count)
 {
 	struct port *port;
 
+	/* If we've not set up the port yet, we have no input to give. */
+	if (unlikely(early_put_chars))
+		return 0;
+
 	port = find_port_by_vtermno(vtermno);
 	if (!port)
-		return 0;
+		return -EPIPE;
 
 	/* If we don't have an input queue yet, we can't get input. */
 	BUG_ON(!port->in_vq);
@@ -705,22 +776,14 @@ static int get_chars(u32 vtermno, char *buf, int count)
 static void resize_console(struct port *port)
 {
 	struct virtio_device *vdev;
-	struct winsize ws;
 
 	/* The port could have been hot-unplugged */
-	if (!port)
+	if (!port || !is_console_port(port))
 		return;
 
 	vdev = port->portdev->vdev;
-	if (virtio_has_feature(vdev, VIRTIO_CONSOLE_F_SIZE)) {
-		vdev->config->get(vdev,
-				  offsetof(struct virtio_console_config, cols),
-				  &ws.ws_col, sizeof(u16));
-		vdev->config->get(vdev,
-				  offsetof(struct virtio_console_config, rows),
-				  &ws.ws_row, sizeof(u16));
-		hvc_resize(port->cons.hvc, ws);
-	}
+	if (virtio_has_feature(vdev, VIRTIO_CONSOLE_F_SIZE))
+		hvc_resize(port->cons.hvc, port->cons.ws);
 }
 
 /* We set the configuration at this point, since we now have a tty */
@@ -804,6 +867,13 @@ int init_port_console(struct port *port)
 	spin_unlock_irq(&pdrvdata_lock);
 	port->guest_connected = true;
 
+	/*
+	 * Start using the new console output if this is the first
+	 * console to come up.
+	 */
+	if (early_put_chars)
+		early_put_chars = NULL;
+
 	/* Notify host of port being opened */
 	send_control_msg(port, VIRTIO_CONSOLE_PORT_OPEN, 1);
 
@@ -859,6 +929,8 @@ static ssize_t debugfs_read(struct file *filp, char __user *ubuf,
 	out_offset += snprintf(buf + out_offset, out_count - out_offset,
 			       "host_connected: %d\n", port->host_connected);
 	out_offset += snprintf(buf + out_offset, out_count - out_offset,
+			       "outvq_full: %d\n", port->outvq_full);
+	out_offset += snprintf(buf + out_offset, out_count - out_offset,
 			       "is_console: %s\n",
 			       is_console_port(port) ? "yes" : "no");
 	out_offset += snprintf(buf + out_offset, out_count - out_offset,
@@ -875,6 +947,153 @@ static const struct file_operations port_debugfs_ops = {
 	.read  = debugfs_read,
 };
 
+static void set_console_size(struct port *port, u16 rows, u16 cols)
+{
+	if (!port || !is_console_port(port))
+		return;
+
+	port->cons.ws.ws_row = rows;
+	port->cons.ws.ws_col = cols;
+}
+
+static unsigned int fill_queue(struct virtqueue *vq, spinlock_t *lock)
+{
+	struct port_buffer *buf;
+	unsigned int nr_added_bufs;
+	int ret;
+
+	nr_added_bufs = 0;
+	do {
+		buf = alloc_buf(PAGE_SIZE);
+		if (!buf)
+			break;
+
+		spin_lock_irq(lock);
+		ret = add_inbuf(vq, buf);
+		if (ret < 0) {
+			spin_unlock_irq(lock);
+			free_buf(buf);
+			break;
+		}
+		nr_added_bufs++;
+		spin_unlock_irq(lock);
+	} while (ret > 0);
+
+	return nr_added_bufs;
+}
+
+static int add_port(struct ports_device *portdev, u32 id)
+{
+	char debugfs_name[16];
+	struct port *port;
+	struct port_buffer *buf;
+	dev_t devt;
+	unsigned int nr_added_bufs;
+	int err;
+
+	port = kmalloc(sizeof(*port), GFP_KERNEL);
+	if (!port) {
+		err = -ENOMEM;
+		goto fail;
+	}
+
+	port->portdev = portdev;
+	port->id = id;
+
+	port->name = NULL;
+	port->inbuf = NULL;
+	port->cons.hvc = NULL;
+
+	port->cons.ws.ws_row = port->cons.ws.ws_col = 0;
+
+	port->host_connected = port->guest_connected = false;
+
+	port->outvq_full = false;
+
+	port->in_vq = portdev->in_vqs[port->id];
+	port->out_vq = portdev->out_vqs[port->id];
+
+	cdev_init(&port->cdev, &port_fops);
+
+	devt = MKDEV(portdev->chr_major, id);
+	err = cdev_add(&port->cdev, devt, 1);
+	if (err < 0) {
+		dev_err(&port->portdev->vdev->dev,
+			"Error %d adding cdev for port %u\n", err, id);
+		goto free_port;
+	}
+	port->dev = device_create(pdrvdata.class, &port->portdev->vdev->dev,
+				  devt, port, "vport%up%u",
+				  port->portdev->drv_index, id);
+	if (IS_ERR(port->dev)) {
+		err = PTR_ERR(port->dev);
+		dev_err(&port->portdev->vdev->dev,
+			"Error %d creating device for port %u\n",
+			err, id);
+		goto free_cdev;
+	}
+
+	spin_lock_init(&port->inbuf_lock);
+	spin_lock_init(&port->outvq_lock);
+	init_waitqueue_head(&port->waitqueue);
+
+	/* Fill the in_vq with buffers so the host can send us data. */
+	nr_added_bufs = fill_queue(port->in_vq, &port->inbuf_lock);
+	if (!nr_added_bufs) {
+		dev_err(port->dev, "Error allocating inbufs\n");
+		err = -ENOMEM;
+		goto free_device;
+	}
+
+	/*
+	 * If we're not using multiport support, this has to be a console port
+	 */
+	if (!use_multiport(port->portdev)) {
+		err = init_port_console(port);
+		if (err)
+			goto free_inbufs;
+	}
+
+	spin_lock_irq(&portdev->ports_lock);
+	list_add_tail(&port->list, &port->portdev->ports);
+	spin_unlock_irq(&portdev->ports_lock);
+
+	/*
+	 * Tell the Host we're set so that it can send us various
+	 * configuration parameters for this port (eg, port name,
+	 * caching, whether this is a console port, etc.)
+	 */
+	send_control_msg(port, VIRTIO_CONSOLE_PORT_READY, 1);
+
+	if (pdrvdata.debugfs_dir) {
+		/*
+		 * Finally, create the debugfs file that we can use to
+		 * inspect a port's state at any time
+		 */
+		sprintf(debugfs_name, "vport%up%u",
+			port->portdev->drv_index, id);
+		port->debugfs_file = debugfs_create_file(debugfs_name, 0444,
+							 pdrvdata.debugfs_dir,
+							 port,
+							 &port_debugfs_ops);
+	}
+	return 0;
+
+free_inbufs:
+	while ((buf = virtqueue_detach_unused_buf(port->in_vq)))
+		free_buf(buf);
+free_device:
+	device_destroy(pdrvdata.class, port->dev->devt);
+free_cdev:
+	cdev_del(&port->cdev);
+free_port:
+	kfree(port);
+fail:
+	/* The host might want to notify management sw about port add failure */
+	send_control_msg(port, VIRTIO_CONSOLE_PORT_READY, 0);
+	return err;
+}
+
 /* Remove all port-specific data. */
 static int remove_port(struct port *port)
 {
@@ -888,7 +1107,18 @@ static int remove_port(struct port *port)
 		spin_lock_irq(&pdrvdata_lock);
 		list_del(&port->cons.list);
 		spin_unlock_irq(&pdrvdata_lock);
+#if 0
+		/*
+		 * hvc_remove() not called as removing one hvc port
+		 * results in other hvc ports getting frozen.
+		 *
+		 * Once this is resolved in hvc, this functionality
+		 * will be enabled.  Till that is done, the -EPIPE
+		 * return from get_chars() above will help
+		 * hvc_console.c to clean up on ports we remove here.
+		 */
 		hvc_remove(port->cons.hvc);
+#endif
 	}
 	if (port->guest_connected)
 		send_control_msg(port, VIRTIO_CONSOLE_PORT_OPEN, 0);
@@ -900,8 +1130,10 @@ static int remove_port(struct port *port)
 	/* Remove unused data this port might have received. */
 	discard_port_data(port);
 
+	reclaim_consumed_buffers(port);
+
 	/* Remove buffers we queued up for the Host to send us data in. */
-	while ((buf = port->in_vq->vq_ops->detach_unused_buf(port->in_vq)))
+	while ((buf = virtqueue_detach_unused_buf(port->in_vq)))
 		free_buf(buf);
 
 	kfree(port->name);
@@ -924,7 +1156,7 @@ static void handle_control_message(struct ports_device *portdev,
 	cpkt = (struct virtio_console_control *)(buf->buf + buf->offset);
 
 	port = find_port_by_id(portdev, cpkt->id);
-	if (!port) {
+	if (!port && cpkt->event != VIRTIO_CONSOLE_PORT_ADD) {
 		/* No valid header at start of buffer.  Drop it. */
 		dev_dbg(&portdev->vdev->dev,
 			"Invalid index %u in control packet\n", cpkt->id);
@@ -932,6 +1164,24 @@ static void handle_control_message(struct ports_device *portdev,
 	}
 
 	switch (cpkt->event) {
+	case VIRTIO_CONSOLE_PORT_ADD:
+		if (port) {
+			dev_dbg(&portdev->vdev->dev,
+				"Port %u already added\n", port->id);
+			send_control_msg(port, VIRTIO_CONSOLE_PORT_READY, 1);
+			break;
+		}
+		if (cpkt->id >= portdev->config.max_nr_ports) {
+			dev_warn(&portdev->vdev->dev,
+				"Request for adding port with out-of-bound id %u, max. supported id: %u\n",
+				cpkt->id, portdev->config.max_nr_ports - 1);
+			break;
+		}
+		add_port(portdev, cpkt->id);
+		break;
+	case VIRTIO_CONSOLE_PORT_REMOVE:
+		remove_port(port);
+		break;
 	case VIRTIO_CONSOLE_CONSOLE_PORT:
 		if (!cpkt->value)
 			break;
@@ -944,15 +1194,34 @@ static void handle_control_message(struct ports_device *portdev,
 		 * have to notify the host first.
 		 */
 		break;
-	case VIRTIO_CONSOLE_RESIZE:
+	case VIRTIO_CONSOLE_RESIZE: {
+		struct {
+			__u16 rows;
+			__u16 cols;
+		} size;
+
 		if (!is_console_port(port))
 			break;
+
+		memcpy(&size, buf->buf + buf->offset + sizeof(*cpkt),
+		       sizeof(size));
+		set_console_size(port, size.rows, size.cols);
+
 		port->cons.hvc->irq_requested = 1;
 		resize_console(port);
 		break;
+	}
 	case VIRTIO_CONSOLE_PORT_OPEN:
 		port->host_connected = cpkt->value;
 		wake_up_interruptible(&port->waitqueue);
+		/*
+		 * If the host port got closed and the host had any
+		 * unconsumed buffers, we'll be able to reclaim them
+		 * now.
+		 */
+		spin_lock_irq(&port->outvq_lock);
+		reclaim_consumed_buffers(port);
+		spin_unlock_irq(&port->outvq_lock);
 		break;
 	case VIRTIO_CONSOLE_PORT_NAME:
 		/*
@@ -990,32 +1259,6 @@ static void handle_control_message(struct ports_device *portdev,
 			kobject_uevent(&port->dev->kobj, KOBJ_CHANGE);
 		}
 		break;
-	case VIRTIO_CONSOLE_PORT_REMOVE:
-		/*
-		 * Hot unplug the port.  We don't decrement nr_ports
-		 * since we don't want to deal with extra complexities
-		 * of using the lowest-available port id: We can just
-		 * pick up the nr_ports number as the id and not have
-		 * userspace send it to us.  This helps us in two
-		 * ways:
-		 *
-		 * - We don't need to have a 'port_id' field in the
-		 *   config space when a port is hot-added.  This is a
-		 *   good thing as we might queue up multiple hotplug
-		 *   requests issued in our workqueue.
-		 *
-		 * - Another way to deal with this would have been to
-		 *   use a bitmap of the active ports and select the
-		 *   lowest non-active port from that map.  That
-		 *   bloats the already tight config space and we
-		 *   would end up artificially limiting the
-		 *   max. number of ports to sizeof(bitmap).  Right
-		 *   now we can support 2^32 ports (as the port id is
-		 *   stored in a u32 type).
-		 *
-		 */
-		remove_port(port);
-		break;
 	}
 }
 
@@ -1030,7 +1273,7 @@ static void control_work_handler(struct work_struct *work)
 	vq = portdev->c_ivq;
 
 	spin_lock(&portdev->cvq_lock);
-	while ((buf = vq->vq_ops->get_buf(vq, &len))) {
+	while ((buf = virtqueue_get_buf(vq, &len))) {
 		spin_unlock(&portdev->cvq_lock);
 
 		buf->len = len;
@@ -1092,204 +1335,29 @@ static void config_intr(struct virtio_device *vdev)
 	struct ports_device *portdev;
 
 	portdev = vdev->priv;
-	if (use_multiport(portdev)) {
-		/* Handle port hot-add */
-		schedule_work(&portdev->config_work);
-	}
-	/*
-	 * We'll use this way of resizing only for legacy support.
-	 * For newer userspace (VIRTIO_CONSOLE_F_MULTPORT+), use
-	 * control messages to indicate console size changes so that
-	 * it can be done per-port
-	 */
-	resize_console(find_port_by_id(portdev, 0));
-}
-
-static unsigned int fill_queue(struct virtqueue *vq, spinlock_t *lock)
-{
-	struct port_buffer *buf;
-	unsigned int nr_added_bufs;
-	int ret;
-
-	nr_added_bufs = 0;
-	do {
-		buf = alloc_buf(PAGE_SIZE);
-		if (!buf)
-			break;
-
-		spin_lock_irq(lock);
-		ret = add_inbuf(vq, buf);
-		if (ret < 0) {
-			spin_unlock_irq(lock);
-			free_buf(buf);
-			break;
-		}
-		nr_added_bufs++;
-		spin_unlock_irq(lock);
-	} while (ret > 0);
-
-	return nr_added_bufs;
-}
-
-static int add_port(struct ports_device *portdev, u32 id)
-{
-	char debugfs_name[16];
-	struct port *port;
-	struct port_buffer *buf;
-	dev_t devt;
-	unsigned int nr_added_bufs;
-	int err;
-
-	port = kmalloc(sizeof(*port), GFP_KERNEL);
-	if (!port) {
-		err = -ENOMEM;
-		goto fail;
-	}
-
-	port->portdev = portdev;
-	port->id = id;
-
-	port->name = NULL;
-	port->inbuf = NULL;
-	port->cons.hvc = NULL;
-
-	port->host_connected = port->guest_connected = false;
-
-	port->in_vq = portdev->in_vqs[port->id];
-	port->out_vq = portdev->out_vqs[port->id];
-
-	cdev_init(&port->cdev, &port_fops);
-
-	devt = MKDEV(portdev->chr_major, id);
-	err = cdev_add(&port->cdev, devt, 1);
-	if (err < 0) {
-		dev_err(&port->portdev->vdev->dev,
-			"Error %d adding cdev for port %u\n", err, id);
-		goto free_port;
-	}
-	port->dev = device_create(pdrvdata.class, &port->portdev->vdev->dev,
-				  devt, port, "vport%up%u",
-				  port->portdev->drv_index, id);
-	if (IS_ERR(port->dev)) {
-		err = PTR_ERR(port->dev);
-		dev_err(&port->portdev->vdev->dev,
-			"Error %d creating device for port %u\n",
-			err, id);
-		goto free_cdev;
-	}
-
-	spin_lock_init(&port->inbuf_lock);
-	init_waitqueue_head(&port->waitqueue);
-
-	/* Fill the in_vq with buffers so the host can send us data. */
-	nr_added_bufs = fill_queue(port->in_vq, &port->inbuf_lock);
-	if (!nr_added_bufs) {
-		dev_err(port->dev, "Error allocating inbufs\n");
-		err = -ENOMEM;
-		goto free_device;
-	}
-
-	/*
-	 * If we're not using multiport support, this has to be a console port
-	 */
-	if (!use_multiport(port->portdev)) {
-		err = init_port_console(port);
-		if (err)
-			goto free_inbufs;
-	}
-
-	spin_lock_irq(&portdev->ports_lock);
-	list_add_tail(&port->list, &port->portdev->ports);
-	spin_unlock_irq(&portdev->ports_lock);
-
-	/*
-	 * Tell the Host we're set so that it can send us various
-	 * configuration parameters for this port (eg, port name,
-	 * caching, whether this is a console port, etc.)
-	 */
-	send_control_msg(port, VIRTIO_CONSOLE_PORT_READY, 1);
-
-	if (pdrvdata.debugfs_dir) {
-		/*
-		 * Finally, create the debugfs file that we can use to
-		 * inspect a port's state at any time
-		 */
-		sprintf(debugfs_name, "vport%up%u",
-			port->portdev->drv_index, id);
-		port->debugfs_file = debugfs_create_file(debugfs_name, 0444,
-							 pdrvdata.debugfs_dir,
-							 port,
-							 &port_debugfs_ops);
-	}
-	return 0;
-
-free_inbufs:
-	while ((buf = port->in_vq->vq_ops->detach_unused_buf(port->in_vq)))
-		free_buf(buf);
-free_device:
-	device_destroy(pdrvdata.class, port->dev->devt);
-free_cdev:
-	cdev_del(&port->cdev);
-free_port:
-	kfree(port);
-fail:
-	return err;
-}
 
-/*
- * The workhandler for config-space updates.
- *
- * This is called when ports are hot-added.
- */
-static void config_work_handler(struct work_struct *work)
-{
-	struct virtio_console_multiport_conf virtconconf;
-	struct ports_device *portdev;
-	struct virtio_device *vdev;
-	int err;
+	if (!use_multiport(portdev)) {
+		struct port *port;
+		u16 rows, cols;
 
-	portdev = container_of(work, struct ports_device, config_work);
+		vdev->config->get(vdev,
+				  offsetof(struct virtio_console_config, cols),
+				  &cols, sizeof(u16));
+		vdev->config->get(vdev,
+				  offsetof(struct virtio_console_config, rows),
+				  &rows, sizeof(u16));
 
-	vdev = portdev->vdev;
-	vdev->config->get(vdev,
-			  offsetof(struct virtio_console_multiport_conf,
-				   nr_ports),
-			  &virtconconf.nr_ports,
-			  sizeof(virtconconf.nr_ports));
+		port = find_port_by_id(portdev, 0);
+		set_console_size(port, rows, cols);
 
-	if (portdev->config.nr_ports == virtconconf.nr_ports) {
 		/*
-		 * Port 0 got hot-added.  Since we already did all the
-		 * other initialisation for it, just tell the Host
-		 * that the port is ready if we find the port.  In
-		 * case the port was hot-removed earlier, we call
-		 * add_port to add the port.
+		 * We'll use this way of resizing only for legacy
+		 * support.  For newer userspace
+		 * (VIRTIO_CONSOLE_F_MULTPORT+), use control messages
+		 * to indicate console size changes so that it can be
+		 * done per-port.
 		 */
-		struct port *port;
-
-		port = find_port_by_id(portdev, 0);
-		if (!port)
-			add_port(portdev, 0);
-		else
-			send_control_msg(port, VIRTIO_CONSOLE_PORT_READY, 1);
-		return;
-	}
-	if (virtconconf.nr_ports > portdev->config.max_nr_ports) {
-		dev_warn(&vdev->dev,
-			 "More ports specified (%u) than allowed (%u)",
-			 portdev->config.nr_ports + 1,
-			 portdev->config.max_nr_ports);
-		return;
-	}
-	if (virtconconf.nr_ports < portdev->config.nr_ports)
-		return;
-
-	/* Hot-add ports */
-	while (virtconconf.nr_ports - portdev->config.nr_ports) {
-		err = add_port(portdev, portdev->config.nr_ports);
-		if (err)
-			break;
-		portdev->config.nr_ports++;
+		resize_console(port);
 	}
 }
 
@@ -1414,7 +1482,6 @@ static const struct file_operations portdev_fops = {
 static int __devinit virtcons_probe(struct virtio_device *vdev)
 {
 	struct ports_device *portdev;
-	u32 i;
 	int err;
 	bool multiport;
 
@@ -1443,37 +1510,19 @@ static int __devinit virtcons_probe(struct virtio_device *vdev)
 	}
 
 	multiport = false;
-	portdev->config.nr_ports = 1;
 	portdev->config.max_nr_ports = 1;
-#if 0 /* Multiport is not quite ready yet --RR */
 	if (virtio_has_feature(vdev, VIRTIO_CONSOLE_F_MULTIPORT)) {
 		multiport = true;
 		vdev->features[0] |= 1 << VIRTIO_CONSOLE_F_MULTIPORT;
 
-		vdev->config->get(vdev,
-				  offsetof(struct virtio_console_multiport_conf,
-					   nr_ports),
-				  &portdev->config.nr_ports,
-				  sizeof(portdev->config.nr_ports));
-		vdev->config->get(vdev,
-				  offsetof(struct virtio_console_multiport_conf,
-					   max_nr_ports),
+		vdev->config->get(vdev, offsetof(struct virtio_console_config,
+						 max_nr_ports),
 				  &portdev->config.max_nr_ports,
 				  sizeof(portdev->config.max_nr_ports));
-		if (portdev->config.nr_ports > portdev->config.max_nr_ports) {
-			dev_warn(&vdev->dev,
-				 "More ports (%u) specified than allowed (%u). Will init %u ports.",
-				 portdev->config.nr_ports,
-				 portdev->config.max_nr_ports,
-				 portdev->config.max_nr_ports);
-
-			portdev->config.nr_ports = portdev->config.max_nr_ports;
-		}
 	}
 
 	/* Let the Host know we support multiple ports.*/
 	vdev->config->finalize_features(vdev);
-#endif
 
 	err = init_vqs(portdev);
 	if (err < 0) {
@@ -1489,7 +1538,6 @@ static int __devinit virtcons_probe(struct virtio_device *vdev)
 
 		spin_lock_init(&portdev->cvq_lock);
 		INIT_WORK(&portdev->control_work, &control_work_handler);
-		INIT_WORK(&portdev->config_work, &config_work_handler);
 
 		nr_added_bufs = fill_queue(portdev->c_ivq, &portdev->cvq_lock);
 		if (!nr_added_bufs) {
@@ -1498,13 +1546,16 @@ static int __devinit virtcons_probe(struct virtio_device *vdev)
 			err = -ENOMEM;
 			goto free_vqs;
 		}
+	} else {
+		/*
+		 * For backward compatibility: Create a console port
+		 * if we're running on older host.
+		 */
+		add_port(portdev, 0);
 	}
 
-	for (i = 0; i < portdev->config.nr_ports; i++)
-		add_port(portdev, i);
-
-	/* Start using the new console output. */
-	early_put_chars = NULL;
+	__send_control_msg(portdev, VIRTIO_CONSOLE_BAD_ID,
+			   VIRTIO_CONSOLE_DEVICE_READY, 1);
 	return 0;
 
 free_vqs:
@@ -1516,6 +1567,9 @@ free_chrdev:
 free:
 	kfree(portdev);
 fail:
+	/* The host might want to notify mgmt sw about device add failure */
+	__send_control_msg(portdev, VIRTIO_CONSOLE_BAD_ID,
+			   VIRTIO_CONSOLE_DEVICE_READY, 0);
 	return err;
 }
 
@@ -1529,17 +1583,16 @@ static void virtcons_remove(struct virtio_device *vdev)
 	portdev = vdev->priv;
 
 	cancel_work_sync(&portdev->control_work);
-	cancel_work_sync(&portdev->config_work);
 
 	list_for_each_entry_safe(port, port2, &portdev->ports, list)
 		remove_port(port);
 
 	unregister_chrdev(portdev->chr_major, "virtio-portsdev");
 
-	while ((buf = portdev->c_ivq->vq_ops->get_buf(portdev->c_ivq, &len)))
+	while ((buf = virtqueue_get_buf(portdev->c_ivq, &len)))
 		free_buf(buf);
 
-	while ((buf = portdev->c_ivq->vq_ops->detach_unused_buf(portdev->c_ivq)))
+	while ((buf = virtqueue_detach_unused_buf(portdev->c_ivq)))
 		free_buf(buf);
 
 	vdev->config->del_vqs(vdev);
@@ -1556,6 +1609,7 @@ static struct virtio_device_id id_table[] = {
 
 static unsigned int features[] = {
 	VIRTIO_CONSOLE_F_SIZE,
+	VIRTIO_CONSOLE_F_MULTIPORT,
 };
 
 static struct virtio_driver virtio_console = {
diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index 3cb9c4e056ff..fa896210ed7b 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -177,7 +177,7 @@ EXPORT_SYMBOL_GPL(ide_pci_clk);
 module_param_named(pci_clock, ide_pci_clk, int, 0);
 MODULE_PARM_DESC(pci_clock, "PCI bus clock frequency (in MHz)");
 
-static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
+static int ide_set_dev_param_mask(const char *s, const struct kernel_param *kp)
 {
 	int a, b, i, j = 1;
 	unsigned int *dev_param_mask = (unsigned int *)kp->arg;
@@ -200,34 +200,40 @@ static int ide_set_dev_param_mask(const char *s, struct kernel_param *kp)
 	return 0;
 }
 
+static struct kernel_param_ops param_ops_ide_dev_mask = {
+	.set = ide_set_dev_param_mask
+};
+
+#define param_check_ide_dev_mask(name, p) param_check_uint(name, p)
+
 static unsigned int ide_nodma;
 
-module_param_call(nodma, ide_set_dev_param_mask, NULL, &ide_nodma, 0);
+module_param_named(nodma, ide_nodma, ide_dev_mask, 0);
 MODULE_PARM_DESC(nodma, "disallow DMA for a device");
 
 static unsigned int ide_noflush;
 
-module_param_call(noflush, ide_set_dev_param_mask, NULL, &ide_noflush, 0);
+module_param_named(noflush, ide_noflush, ide_dev_mask, 0);
 MODULE_PARM_DESC(noflush, "disable flush requests for a device");
 
 static unsigned int ide_nohpa;
 
-module_param_call(nohpa, ide_set_dev_param_mask, NULL, &ide_nohpa, 0);
+module_param_named(nohpa, ide_nohpa, ide_dev_mask, 0);
 MODULE_PARM_DESC(nohpa, "disable Host Protected Area for a device");
 
 static unsigned int ide_noprobe;
 
-module_param_call(noprobe, ide_set_dev_param_mask, NULL, &ide_noprobe, 0);
+module_param_named(noprobe, ide_noprobe, ide_dev_mask, 0);
 MODULE_PARM_DESC(noprobe, "skip probing for a device");
 
 static unsigned int ide_nowerr;
 
-module_param_call(nowerr, ide_set_dev_param_mask, NULL, &ide_nowerr, 0);
+module_param_named(nowerr, ide_nowerr, ide_dev_mask, 0);
 MODULE_PARM_DESC(nowerr, "ignore the ATA_DF bit for a device");
 
 static unsigned int ide_cdroms;
 
-module_param_call(cdrom, ide_set_dev_param_mask, NULL, &ide_cdroms, 0);
+module_param_named(cdrom, ide_cdroms, ide_dev_mask, 0);
 MODULE_PARM_DESC(cdrom, "force device as a CD-ROM");
 
 struct chs_geom {
diff --git a/drivers/input/misc/ati_remote2.c b/drivers/input/misc/ati_remote2.c
index 2124b99378bb..babef88ba1e0 100644
--- a/drivers/input/misc/ati_remote2.c
+++ b/drivers/input/misc/ati_remote2.c
@@ -38,7 +38,8 @@ enum {
 };
 
 static int ati_remote2_set_mask(const char *val,
-				struct kernel_param *kp, unsigned int max)
+				const struct kernel_param *kp,
+				unsigned int max)
 {
 	unsigned long mask;
 	int ret;
@@ -59,28 +60,31 @@ static int ati_remote2_set_mask(const char *val,
 }
 
 static int ati_remote2_set_channel_mask(const char *val,
-					struct kernel_param *kp)
+					const struct kernel_param *kp)
 {
 	pr_debug("%s()\n", __func__);
 
 	return ati_remote2_set_mask(val, kp, ATI_REMOTE2_MAX_CHANNEL_MASK);
 }
 
-static int ati_remote2_get_channel_mask(char *buffer, struct kernel_param *kp)
+static int ati_remote2_get_channel_mask(char *buffer,
+					const struct kernel_param *kp)
 {
 	pr_debug("%s()\n", __func__);
 
 	return sprintf(buffer, "0x%04x", *(unsigned int *)kp->arg);
 }
 
-static int ati_remote2_set_mode_mask(const char *val, struct kernel_param *kp)
+static int ati_remote2_set_mode_mask(const char *val,
+				     const struct kernel_param *kp)
 {
 	pr_debug("%s()\n", __func__);
 
 	return ati_remote2_set_mask(val, kp, ATI_REMOTE2_MAX_MODE_MASK);
 }
 
-static int ati_remote2_get_mode_mask(char *buffer, struct kernel_param *kp)
+static int ati_remote2_get_mode_mask(char *buffer,
+				     const struct kernel_param *kp)
 {
 	pr_debug("%s()\n", __func__);
 
@@ -89,15 +93,19 @@ static int ati_remote2_get_mode_mask(char *buffer, struct kernel_param *kp)
 
 static unsigned int channel_mask = ATI_REMOTE2_MAX_CHANNEL_MASK;
 #define param_check_channel_mask(name, p) __param_check(name, p, unsigned int)
-#define param_set_channel_mask ati_remote2_set_channel_mask
-#define param_get_channel_mask ati_remote2_get_channel_mask
+static struct kernel_param_ops param_ops_channel_mask = {
+	.set = ati_remote2_set_channel_mask,
+	.get = ati_remote2_get_channel_mask,
+};
 module_param(channel_mask, channel_mask, 0644);
 MODULE_PARM_DESC(channel_mask, "Bitmask of channels to accept <15:Channel16>...<1:Channel2><0:Channel1>");
 
 static unsigned int mode_mask = ATI_REMOTE2_MAX_MODE_MASK;
 #define param_check_mode_mask(name, p) __param_check(name, p, unsigned int)
-#define param_set_mode_mask ati_remote2_set_mode_mask
-#define param_get_mode_mask ati_remote2_get_mode_mask
+static struct kernel_param_ops param_ops_mode_mask = {
+	.set = ati_remote2_set_mode_mask,
+	.get = ati_remote2_get_mode_mask,
+};
 module_param(mode_mask, mode_mask, 0644);
 MODULE_PARM_DESC(mode_mask, "Bitmask of modes to accept <4:PC><3:AUX4><2:AUX3><1:AUX2><0:AUX1>");
 
diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
index cbc807264940..9fc4cd0b2056 100644
--- a/drivers/input/mouse/psmouse-base.c
+++ b/drivers/input/mouse/psmouse-base.c
@@ -39,11 +39,13 @@ MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_LICENSE("GPL");
 
 static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
-static int psmouse_set_maxproto(const char *val, struct kernel_param *kp);
-static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp);
+static int psmouse_set_maxproto(const char *val, const struct kernel_param *);
+static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp);
+static struct kernel_param_ops param_ops_proto_abbrev = {
+	.set = psmouse_set_maxproto,
+	.get = psmouse_get_maxproto,
+};
 #define param_check_proto_abbrev(name, p)	__param_check(name, p, unsigned int)
-#define param_set_proto_abbrev			psmouse_set_maxproto
-#define param_get_proto_abbrev			psmouse_get_maxproto
 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
 
@@ -1673,7 +1675,7 @@ static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data,
 }
 
 
-static int psmouse_set_maxproto(const char *val, struct kernel_param *kp)
+static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp)
 {
 	const struct psmouse_protocol *proto;
 
@@ -1690,7 +1692,7 @@ static int psmouse_set_maxproto(const char *val, struct kernel_param *kp)
 	return 0;
 }
 
-static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp)
+static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp)
 {
 	int type = *((unsigned int *)kp->arg);
 
diff --git a/drivers/isdn/hisax/hisax_fcpcipnp.c b/drivers/isdn/hisax/hisax_fcpcipnp.c
index 1925118122f8..8b0a7d86b30f 100644
--- a/drivers/isdn/hisax/hisax_fcpcipnp.c
+++ b/drivers/isdn/hisax/hisax_fcpcipnp.c
@@ -74,9 +74,10 @@ static struct pnp_device_id fcpnp_ids[] __devinitdata = {
 		.id		= "AVM0900",
 		.driver_data	= (unsigned long) "Fritz!Card PnP",
 	},
+	{ .id = "" }
 };
 
-MODULE_DEVICE_TABLE(isapnp, fcpnp_ids);
+MODULE_DEVICE_TABLE(pnp, fcpnp_ids);
 #endif
 
 static int protocol = 2;       /* EURO-ISDN Default */
diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index a6a57011ba6c..b112f34d264b 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -109,8 +109,7 @@ MODULE_PARM_DESC(mpt_debug_level, " debug level - refer to mptdebug.h \
 
 int mpt_fwfault_debug;
 EXPORT_SYMBOL(mpt_fwfault_debug);
-module_param_call(mpt_fwfault_debug, param_set_int, param_get_int,
-	  &mpt_fwfault_debug, 0600);
+module_param(mpt_fwfault_debug, int, 0600);
 MODULE_PARM_DESC(mpt_fwfault_debug, "Enable detection of Firmware fault"
 	" and halt Firmware on fault - (default=0)");
 
diff --git a/drivers/misc/lkdtm.c b/drivers/misc/lkdtm.c
index 31a991161f0a..dcadb5edb234 100644
--- a/drivers/misc/lkdtm.c
+++ b/drivers/misc/lkdtm.c
@@ -118,9 +118,9 @@ static int count = DEFAULT_COUNT;
 module_param(recur_count, int, 0644);
 MODULE_PARM_DESC(recur_count, " Recursion level for the stack overflow test, "\
 				 "default is 10");
-module_param(cpoint_name, charp, 0644);
+module_param(cpoint_name, charp, 0444);
 MODULE_PARM_DESC(cpoint_name, " Crash Point, where kernel is to be crashed");
-module_param(cpoint_type, charp, 0644);
+module_param(cpoint_type, charp, 0444);
 MODULE_PARM_DESC(cpoint_type, " Crash Point Type, action to be taken on "\
 				"hitting the crash point");
 module_param(cpoint_count, int, 0644);
diff --git a/drivers/net/myri10ge/myri10ge.c b/drivers/net/myri10ge/myri10ge.c
index e0b47cc8a86e..5ae8a93fe4f5 100644
--- a/drivers/net/myri10ge/myri10ge.c
+++ b/drivers/net/myri10ge/myri10ge.c
@@ -239,6 +239,7 @@ struct myri10ge_priv {
 	int watchdog_resets;
 	int watchdog_pause;
 	int pause;
+	bool fw_name_allocated;
 	char *fw_name;
 	char eeprom_strings[MYRI10GE_EEPROM_STRINGS_SIZE];
 	char *product_code_string;
@@ -271,6 +272,7 @@ MODULE_FIRMWARE("myri10ge_eth_z8e.dat");
 MODULE_FIRMWARE("myri10ge_rss_ethp_z8e.dat");
 MODULE_FIRMWARE("myri10ge_rss_eth_z8e.dat");
 
+/* Careful: must be accessed under kparam_block_sysfs_write */
 static char *myri10ge_fw_name = NULL;
 module_param(myri10ge_fw_name, charp, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(myri10ge_fw_name, "Firmware image name");
@@ -376,6 +378,14 @@ static inline void put_be32(__be32 val, __be32 __iomem * p)
 
 static struct net_device_stats *myri10ge_get_stats(struct net_device *dev);
 
+static void set_fw_name(struct myri10ge_priv *mgp, char *name, bool allocated)
+{
+	if (mgp->fw_name_allocated)
+		kfree(mgp->fw_name);
+	mgp->fw_name = name;
+	mgp->fw_name_allocated = allocated;
+}
+
 static int
 myri10ge_send_cmd(struct myri10ge_priv *mgp, u32 cmd,
 		  struct myri10ge_cmd *data, int atomic)
@@ -747,7 +757,7 @@ static int myri10ge_load_firmware(struct myri10ge_priv *mgp, int adopt)
 			dev_warn(&mgp->pdev->dev, "via hotplug\n");
 		}
 
-		mgp->fw_name = "adopted";
+		set_fw_name(mgp, "adopted", false);
 		mgp->tx_boundary = 2048;
 		myri10ge_dummy_rdma(mgp, 1);
 		status = myri10ge_get_firmware_capabilities(mgp);
@@ -3229,7 +3239,7 @@ static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
 	 * load the optimized firmware (which assumes aligned PCIe
 	 * completions) in order to see if it works on this host.
 	 */
-	mgp->fw_name = myri10ge_fw_aligned;
+	set_fw_name(mgp, myri10ge_fw_aligned, false);
 	status = myri10ge_load_firmware(mgp, 1);
 	if (status != 0) {
 		goto abort;
@@ -3257,7 +3267,7 @@ static void myri10ge_firmware_probe(struct myri10ge_priv *mgp)
 abort:
 	/* fall back to using the unaligned firmware */
 	mgp->tx_boundary = 2048;
-	mgp->fw_name = myri10ge_fw_unaligned;
+	set_fw_name(mgp, myri10ge_fw_unaligned, false);
 
 }
 
@@ -3280,7 +3290,7 @@ static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
 			dev_info(&mgp->pdev->dev, "PCIE x%d Link\n",
 				 link_width);
 			mgp->tx_boundary = 4096;
-			mgp->fw_name = myri10ge_fw_aligned;
+			set_fw_name(mgp, myri10ge_fw_aligned, false);
 		} else {
 			myri10ge_firmware_probe(mgp);
 		}
@@ -3289,22 +3299,29 @@ static void myri10ge_select_firmware(struct myri10ge_priv *mgp)
 			dev_info(&mgp->pdev->dev,
 				 "Assuming aligned completions (forced)\n");
 			mgp->tx_boundary = 4096;
-			mgp->fw_name = myri10ge_fw_aligned;
+			set_fw_name(mgp, myri10ge_fw_aligned, false);
 		} else {
 			dev_info(&mgp->pdev->dev,
 				 "Assuming unaligned completions (forced)\n");
 			mgp->tx_boundary = 2048;
-			mgp->fw_name = myri10ge_fw_unaligned;
+			set_fw_name(mgp, myri10ge_fw_unaligned, false);
 		}
 	}
+
+	kparam_block_sysfs_write(myri10ge_fw_name);
 	if (myri10ge_fw_name != NULL) {
-		overridden = 1;
-		mgp->fw_name = myri10ge_fw_name;
+		char *fw_name = kstrdup(myri10ge_fw_name, GFP_KERNEL);
+		if (fw_name) {
+			overridden = 1;
+			set_fw_name(mgp, fw_name, true);
+		}
 	}
+	kparam_unblock_sysfs_write(myri10ge_fw_name);
+
 	if (mgp->board_number < MYRI10GE_MAX_BOARDS &&
 	    myri10ge_fw_names[mgp->board_number] != NULL &&
 	    strlen(myri10ge_fw_names[mgp->board_number])) {
-		mgp->fw_name = myri10ge_fw_names[mgp->board_number];
+		set_fw_name(mgp, myri10ge_fw_names[mgp->board_number], false);
 		overridden = 1;
 	}
 	if (overridden)
@@ -3656,6 +3673,7 @@ static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
 	struct myri10ge_cmd cmd;
 	struct pci_dev *pdev = mgp->pdev;
 	char *old_fw;
+	bool old_allocated;
 	int i, status, ncpus, msix_cap;
 
 	mgp->num_slices = 1;
@@ -3668,17 +3686,23 @@ static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
 
 	/* try to load the slice aware rss firmware */
 	old_fw = mgp->fw_name;
+	old_allocated = mgp->fw_name_allocated;
+	/* don't free old_fw if we override it. */
+	mgp->fw_name_allocated = false;
+
 	if (myri10ge_fw_name != NULL) {
 		dev_info(&mgp->pdev->dev, "overriding rss firmware to %s\n",
 			 myri10ge_fw_name);
-		mgp->fw_name = myri10ge_fw_name;
+		set_fw_name(mgp, myri10ge_fw_name, false);
 	} else if (old_fw == myri10ge_fw_aligned)
-		mgp->fw_name = myri10ge_fw_rss_aligned;
+		set_fw_name(mgp, myri10ge_fw_rss_aligned, false);
 	else
-		mgp->fw_name = myri10ge_fw_rss_unaligned;
+		set_fw_name(mgp, myri10ge_fw_rss_unaligned, false);
 	status = myri10ge_load_firmware(mgp, 0);
 	if (status != 0) {
 		dev_info(&pdev->dev, "Rss firmware not found\n");
+		if (old_allocated)
+			kfree(old_fw);
 		return;
 	}
 
@@ -3743,6 +3767,8 @@ static void myri10ge_probe_slices(struct myri10ge_priv *mgp)
 					 mgp->num_slices);
 		if (status == 0) {
 			pci_disable_msix(pdev);
+			if (old_allocated)
+				kfree(old_fw);
 			return;
 		}
 		if (status > 0)
@@ -3759,7 +3785,7 @@ disable_msix:
 
 abort_with_fw:
 	mgp->num_slices = 1;
-	mgp->fw_name = old_fw;
+	set_fw_name(mgp, old_fw, old_allocated);
 	myri10ge_load_firmware(mgp, 0);
 }
 
@@ -3989,6 +4015,7 @@ abort_with_enabled:
 	pci_disable_device(pdev);
 
 abort_with_netdev:
+	set_fw_name(mgp, NULL, false);
 	free_netdev(netdev);
 	return status;
 }
@@ -4033,6 +4060,7 @@ static void myri10ge_remove(struct pci_dev *pdev)
 	dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
 			  mgp->cmd, mgp->cmd_bus);
 
+	set_fw_name(mgp, NULL, false);
 	free_netdev(netdev);
 	pci_disable_device(pdev);
 	pci_set_drvdata(pdev, NULL);
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index b0a85d038796..890d45e90b25 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -122,7 +122,7 @@ static void skb_xmit_done(struct virtqueue *svq)
 	struct virtnet_info *vi = svq->vdev->priv;
 
 	/* Suppress further interrupts. */
-	svq->vq_ops->disable_cb(svq);
+	virtqueue_disable_cb(svq);
 
 	/* We were probably waiting for more output buffers. */
 	netif_wake_queue(vi->dev);
@@ -210,7 +210,7 @@ static int receive_mergeable(struct virtnet_info *vi, struct sk_buff *skb)
 			return -EINVAL;
 		}
 
-		page = vi->rvq->vq_ops->get_buf(vi->rvq, &len);
+		page = virtqueue_get_buf(vi->rvq, &len);
 		if (!page) {
 			pr_debug("%s: rx error: %d buffers missing\n",
 				 skb->dev->name, hdr->mhdr.num_buffers);
@@ -340,7 +340,7 @@ static int add_recvbuf_small(struct virtnet_info *vi, gfp_t gfp)
 
 	skb_to_sgvec(skb, vi->rx_sg + 1, 0, skb->len);
 
-	err = vi->rvq->vq_ops->add_buf(vi->rvq, vi->rx_sg, 0, 2, skb);
+	err = virtqueue_add_buf_gfp(vi->rvq, vi->rx_sg, 0, 2, skb, gfp);
 	if (err < 0)
 		dev_kfree_skb(skb);
 
@@ -385,8 +385,8 @@ static int add_recvbuf_big(struct virtnet_info *vi, gfp_t gfp)
 
 	/* chain first in list head */
 	first->private = (unsigned long)list;
-	err = vi->rvq->vq_ops->add_buf(vi->rvq, vi->rx_sg, 0, MAX_SKB_FRAGS + 2,
-				       first);
+	err = virtqueue_add_buf_gfp(vi->rvq, vi->rx_sg, 0, MAX_SKB_FRAGS + 2,
+				    first, gfp);
 	if (err < 0)
 		give_pages(vi, first);
 
@@ -404,7 +404,7 @@ static int add_recvbuf_mergeable(struct virtnet_info *vi, gfp_t gfp)
 
 	sg_init_one(vi->rx_sg, page_address(page), PAGE_SIZE);
 
-	err = vi->rvq->vq_ops->add_buf(vi->rvq, vi->rx_sg, 0, 1, page);
+	err = virtqueue_add_buf_gfp(vi->rvq, vi->rx_sg, 0, 1, page, gfp);
 	if (err < 0)
 		give_pages(vi, page);
 
@@ -433,7 +433,7 @@ static bool try_fill_recv(struct virtnet_info *vi, gfp_t gfp)
 	} while (err > 0);
 	if (unlikely(vi->num > vi->max))
 		vi->max = vi->num;
-	vi->rvq->vq_ops->kick(vi->rvq);
+	virtqueue_kick(vi->rvq);
 	return !oom;
 }
 
@@ -442,7 +442,7 @@ static void skb_recv_done(struct virtqueue *rvq)
 	struct virtnet_info *vi = rvq->vdev->priv;
 	/* Schedule NAPI, Suppress further interrupts if successful. */
 	if (napi_schedule_prep(&vi->napi)) {
-		rvq->vq_ops->disable_cb(rvq);
+		virtqueue_disable_cb(rvq);
 		__napi_schedule(&vi->napi);
 	}
 }
@@ -471,7 +471,7 @@ static int virtnet_poll(struct napi_struct *napi, int budget)
 
 again:
 	while (received < budget &&
-	       (buf = vi->rvq->vq_ops->get_buf(vi->rvq, &len)) != NULL) {
+	       (buf = virtqueue_get_buf(vi->rvq, &len)) != NULL) {
 		receive_buf(vi->dev, buf, len);
 		--vi->num;
 		received++;
@@ -485,9 +485,9 @@ again:
 	/* Out of packets? */
 	if (received < budget) {
 		napi_complete(napi);
-		if (unlikely(!vi->rvq->vq_ops->enable_cb(vi->rvq)) &&
+		if (unlikely(!virtqueue_enable_cb(vi->rvq)) &&
 		    napi_schedule_prep(napi)) {
-			vi->rvq->vq_ops->disable_cb(vi->rvq);
+			virtqueue_disable_cb(vi->rvq);
 			__napi_schedule(napi);
 			goto again;
 		}
@@ -501,7 +501,7 @@ static unsigned int free_old_xmit_skbs(struct virtnet_info *vi)
 	struct sk_buff *skb;
 	unsigned int len, tot_sgs = 0;
 
-	while ((skb = vi->svq->vq_ops->get_buf(vi->svq, &len)) != NULL) {
+	while ((skb = virtqueue_get_buf(vi->svq, &len)) != NULL) {
 		pr_debug("Sent skb %p\n", skb);
 		vi->dev->stats.tx_bytes += skb->len;
 		vi->dev->stats.tx_packets++;
@@ -554,8 +554,7 @@ static int xmit_skb(struct virtnet_info *vi, struct sk_buff *skb)
 		sg_set_buf(vi->tx_sg, &hdr->hdr, sizeof hdr->hdr);
 
 	hdr->num_sg = skb_to_sgvec(skb, vi->tx_sg + 1, 0, skb->len) + 1;
-	return vi->svq->vq_ops->add_buf(vi->svq, vi->tx_sg, hdr->num_sg,
-					0, skb);
+	return virtqueue_add_buf(vi->svq,  vi->tx_sg, hdr->num_sg, 0, skb);
 }
 
 static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev)
@@ -574,14 +573,14 @@ again:
 	if (unlikely(capacity < 0)) {
 		netif_stop_queue(dev);
 		dev_warn(&dev->dev, "Unexpected full queue\n");
-		if (unlikely(!vi->svq->vq_ops->enable_cb(vi->svq))) {
-			vi->svq->vq_ops->disable_cb(vi->svq);
+		if (unlikely(!virtqueue_enable_cb(vi->svq))) {
+			virtqueue_disable_cb(vi->svq);
 			netif_start_queue(dev);
 			goto again;
 		}
 		return NETDEV_TX_BUSY;
 	}
-	vi->svq->vq_ops->kick(vi->svq);
+	virtqueue_kick(vi->svq);
 
 	/* Don't wait up for transmitted skbs to be freed. */
 	skb_orphan(skb);
@@ -591,12 +590,12 @@ again:
 	 * before it gets out of hand.  Naturally, this wastes entries. */
 	if (capacity < 2+MAX_SKB_FRAGS) {
 		netif_stop_queue(dev);
-		if (unlikely(!vi->svq->vq_ops->enable_cb(vi->svq))) {
+		if (unlikely(!virtqueue_enable_cb(vi->svq))) {
 			/* More just got used, free them then recheck. */
 			capacity += free_old_xmit_skbs(vi);
 			if (capacity >= 2+MAX_SKB_FRAGS) {
 				netif_start_queue(dev);
-				vi->svq->vq_ops->disable_cb(vi->svq);
+				virtqueue_disable_cb(vi->svq);
 			}
 		}
 	}
@@ -641,7 +640,7 @@ static int virtnet_open(struct net_device *dev)
 	 * now.  virtnet_poll wants re-enable the queue, so we disable here.
 	 * We synchronize against interrupts via NAPI_STATE_SCHED */
 	if (napi_schedule_prep(&vi->napi)) {
-		vi->rvq->vq_ops->disable_cb(vi->rvq);
+		virtqueue_disable_cb(vi->rvq);
 		__napi_schedule(&vi->napi);
 	}
 	return 0;
@@ -678,15 +677,15 @@ static bool virtnet_send_command(struct virtnet_info *vi, u8 class, u8 cmd,
 		sg_set_buf(&sg[i + 1], sg_virt(s), s->length);
 	sg_set_buf(&sg[out + in - 1], &status, sizeof(status));
 
-	BUG_ON(vi->cvq->vq_ops->add_buf(vi->cvq, sg, out, in, vi) < 0);
+	BUG_ON(virtqueue_add_buf(vi->cvq, sg, out, in, vi) < 0);
 
-	vi->cvq->vq_ops->kick(vi->cvq);
+	virtqueue_kick(vi->cvq);
 
 	/*
 	 * Spin for a response, the kick causes an ioport write, trapping
 	 * into the hypervisor, so the request should be handled immediately.
 	 */
-	while (!vi->cvq->vq_ops->get_buf(vi->cvq, &tmp))
+	while (!virtqueue_get_buf(vi->cvq, &tmp))
 		cpu_relax();
 
 	return status == VIRTIO_NET_OK;
@@ -1003,13 +1002,13 @@ static void free_unused_bufs(struct virtnet_info *vi)
 {
 	void *buf;
 	while (1) {
-		buf = vi->svq->vq_ops->detach_unused_buf(vi->svq);
+		buf = virtqueue_detach_unused_buf(vi->svq);
 		if (!buf)
 			break;
 		dev_kfree_skb(buf);
 	}
 	while (1) {
-		buf = vi->rvq->vq_ops->detach_unused_buf(vi->rvq);
+		buf = virtqueue_detach_unused_buf(vi->rvq);
 		if (!buf)
 			break;
 		if (vi->mergeable_rx_bufs || vi->big_packets)
diff --git a/drivers/net/wireless/libertas/if_sdio.c b/drivers/net/wireless/libertas/if_sdio.c
index 64dd345d30f5..7a59574cbb04 100644
--- a/drivers/net/wireless/libertas/if_sdio.c
+++ b/drivers/net/wireless/libertas/if_sdio.c
@@ -125,6 +125,8 @@ struct if_sdio_card {
 
 	const char		*helper;
 	const char		*firmware;
+	bool			helper_allocated;
+	bool			firmware_allocated;
 
 	u8			buffer[65536];
 
@@ -984,16 +986,34 @@ static int if_sdio_probe(struct sdio_func *func,
 	card->helper = if_sdio_models[i].helper;
 	card->firmware = if_sdio_models[i].firmware;
 
+	kparam_block_sysfs_write(helper_name);
 	if (lbs_helper_name) {
+		char *helper = kstrdup(lbs_helper_name, GFP_KERNEL);
+		if (!helper) {
+			kparam_unblock_sysfs_write(helper_name);
+			ret = -ENOMEM;
+			goto free;
+		}
 		lbs_deb_sdio("overriding helper firmware: %s\n",
 			lbs_helper_name);
-		card->helper = lbs_helper_name;
+		card->helper = helper;
+		card->helper_allocated = true;
 	}
+	kparam_unblock_sysfs_write(helper_name);
 
+	kparam_block_sysfs_write(fw_name);
 	if (lbs_fw_name) {
+		char *fw_name = kstrdup(lbs_fw_name, GFP_KERNEL);
+		if (!fw_name) {
+			kparam_unblock_sysfs_write(fw_name);
+			ret = -ENOMEM;
+			goto free;
+		}
 		lbs_deb_sdio("overriding firmware: %s\n", lbs_fw_name);
-		card->firmware = lbs_fw_name;
+		card->firmware = fw_name;
+		card->firmware_allocated = true;
 	}
+	kparam_unblock_sysfs_write(fw_name);
 
 	sdio_claim_host(func);
 
@@ -1127,6 +1147,10 @@ free:
 		kfree(packet);
 	}
 
+	if (card->helper_allocated)
+		kfree(card->helper);
+	if (card->firmware_allocated)
+		kfree(card->firmware);
 	kfree(card);
 
 	goto out;
@@ -1177,6 +1201,10 @@ static void if_sdio_remove(struct sdio_func *func)
 		kfree(packet);
 	}
 
+	if (card->helper_allocated)
+		kfree(card->helper);
+	if (card->firmware_allocated)
+		kfree(card->firmware);
 	kfree(card);
 
 	lbs_deb_leave(LBS_DEB_SDIO);
diff --git a/drivers/net/wireless/libertas/if_usb.c b/drivers/net/wireless/libertas/if_usb.c
index fcea5741ba62..331e3b724874 100644
--- a/drivers/net/wireless/libertas/if_usb.c
+++ b/drivers/net/wireless/libertas/if_usb.c
@@ -291,10 +291,13 @@ static int if_usb_probe(struct usb_interface *intf,
 	}
 
 	/* Upload firmware */
+	kparam_block_sysfs_write(fw_name);
 	if (__if_usb_prog_firmware(cardp, lbs_fw_name, BOOT_CMD_FW_BY_USB)) {
+		kparam_unblock_sysfs_write(fw_name);
 		lbs_deb_usbd(&udev->dev, "FW upload failed\n");
 		goto err_prog_firmware;
 	}
+	kparam_unblock_sysfs_write(fw_name);
 
 	if (!(priv = lbs_add_card(cardp, &udev->dev)))
 		goto err_prog_firmware;
diff --git a/drivers/net/wireless/libertas_tf/if_usb.c b/drivers/net/wireless/libertas_tf/if_usb.c
index 4412c279ca94..c1c9e31e29a1 100644
--- a/drivers/net/wireless/libertas_tf/if_usb.c
+++ b/drivers/net/wireless/libertas_tf/if_usb.c
@@ -813,12 +813,15 @@ static int if_usb_prog_firmware(struct if_usb_card *cardp)
 
 	lbtf_deb_enter(LBTF_DEB_USB);
 
+	kparam_block_sysfs_write(fw_name);
 	ret = request_firmware(&cardp->fw, lbtf_fw_name, &cardp->udev->dev);
 	if (ret < 0) {
 		pr_err("request_firmware() failed with %#x\n", ret);
 		pr_err("firmware %s not found\n", lbtf_fw_name);
+		kparam_unblock_sysfs_write(fw_name);
 		goto done;
 	}
+	kparam_unblock_sysfs_write(fw_name);
 
 	if (check_fwfile_format(cardp->fw->data, cardp->fw->size))
 		goto release_fw;
diff --git a/drivers/scsi/bfa/bfad.c b/drivers/scsi/bfa/bfad.c
index d4fc4287ebd3..24d015241e5b 100644
--- a/drivers/scsi/bfa/bfad.c
+++ b/drivers/scsi/bfa/bfad.c
@@ -729,6 +729,7 @@ bfad_drv_init(struct bfad_s *bfad)
 	memset(&driver_info, 0, sizeof(driver_info));
 	strncpy(driver_info.version, BFAD_DRIVER_VERSION,
 		sizeof(driver_info.version) - 1);
+	__kernel_param_lock();
 	if (host_name)
 		strncpy(driver_info.host_machine_name, host_name,
 			sizeof(driver_info.host_machine_name) - 1);
@@ -738,6 +739,7 @@ bfad_drv_init(struct bfad_s *bfad)
 	if (os_patch)
 		strncpy(driver_info.host_os_patch, os_patch,
 			sizeof(driver_info.host_os_patch) - 1);
+	__kernel_param_unlock();
 
 	strncpy(driver_info.os_device_name, bfad->pci_name,
 		sizeof(driver_info.os_device_name - 1));
diff --git a/drivers/staging/rtl8187se/r8180_core.c b/drivers/staging/rtl8187se/r8180_core.c
index 55d12e3271de..b09ce4b517a4 100644
--- a/drivers/staging/rtl8187se/r8180_core.c
+++ b/drivers/staging/rtl8187se/r8180_core.c
@@ -61,7 +61,7 @@ static struct pci_device_id rtl8180_pci_id_tbl[] __devinitdata = {
 };
 
 
-static char* ifname = "wlan%d";
+static char ifname[IFNAMSIZ] = "wlan%d";
 static int hwseqnum = 0;
 static int hwwep = 0;
 static int channels = 0x3fff;
@@ -74,7 +74,7 @@ MODULE_AUTHOR("Andrea Merello <andreamrl@tiscali.it>");
 MODULE_DESCRIPTION("Linux driver for Realtek RTL8180 / RTL8185 WiFi cards");
 
 
-module_param(ifname, charp, S_IRUGO|S_IWUSR );
+module_param_string(ifname, ifname, sizeof(ifname), S_IRUGO|S_IWUSR);
 module_param(hwseqnum,int, S_IRUGO|S_IWUSR);
 module_param(hwwep,int, S_IRUGO|S_IWUSR);
 module_param(channels,int, S_IRUGO|S_IWUSR);
@@ -3613,7 +3613,7 @@ static int __devinit rtl8180_pci_probe(struct pci_dev *pdev,
 
 	if (dev_alloc_name(dev, ifname) < 0){
                 DMESG("Oops: devname already taken! Trying wlan%%d...\n");
-		ifname = "wlan%d";
+		strcpy(ifname, "wlan%d");
 		dev_alloc_name(dev, ifname);
         }
 
diff --git a/drivers/staging/rtl8192e/r8192E_core.c b/drivers/staging/rtl8192e/r8192E_core.c
index bb7e1ef28d3b..dbb6fe3c9ddd 100644
--- a/drivers/staging/rtl8192e/r8192E_core.c
+++ b/drivers/staging/rtl8192e/r8192E_core.c
@@ -116,7 +116,7 @@ static struct pci_device_id rtl8192_pci_id_tbl[] __devinitdata = {
 	{}
 };
 
-static char* ifname = "wlan%d";
+static char ifname[IFNAMSIZ] = "wlan%d";
 static int hwwep = 1; //default use hw. set 0 to use software security
 static int channels = 0x3fff;
 
@@ -127,7 +127,7 @@ MODULE_DEVICE_TABLE(pci, rtl8192_pci_id_tbl);
 MODULE_DESCRIPTION("Linux driver for Realtek RTL819x WiFi cards");
 
 
-module_param(ifname, charp, S_IRUGO|S_IWUSR );
+module_param_string(ifname, ifname, sizeof(ifname), S_IRUGO|S_IWUSR);
 //module_param(hwseqnum,int, S_IRUGO|S_IWUSR);
 module_param(hwwep,int, S_IRUGO|S_IWUSR);
 module_param(channels,int, S_IRUGO|S_IWUSR);
@@ -6453,7 +6453,7 @@ static int __devinit rtl8192_pci_probe(struct pci_dev *pdev,
 
 	if (dev_alloc_name(dev, ifname) < 0){
                 RT_TRACE(COMP_INIT, "Oops: devname already taken! Trying wlan%%d...\n");
-		ifname = "wlan%d";
+		strcpy(ifname, "wlan%d");
 		dev_alloc_name(dev, ifname);
         }
 
diff --git a/drivers/staging/rtl8192su/r8192U_core.c b/drivers/staging/rtl8192su/r8192U_core.c
index 04d9b85f3d4c..fcad2cdfeae7 100644
--- a/drivers/staging/rtl8192su/r8192U_core.c
+++ b/drivers/staging/rtl8192su/r8192U_core.c
@@ -142,13 +142,13 @@ MODULE_VERSION("V 1.1");
 MODULE_DEVICE_TABLE(usb, rtl8192_usb_id_tbl);
 MODULE_DESCRIPTION("Linux driver for Realtek RTL8192 USB WiFi cards");
 
-static char* ifname = "wlan%d";
+static char ifname[IFNAMSIZ] = "wlan%d";
 static int hwwep = 1;  //default use hw. set 0 to use software security
 static int channels = 0x3fff;
 
 
 
-module_param(ifname, charp, S_IRUGO|S_IWUSR );
+module_param_string(ifname, ifname, sizeof(ifname), S_IRUGO|S_IWUSR);
 //module_param(hwseqnum,int, S_IRUGO|S_IWUSR);
 module_param(hwwep,int, S_IRUGO|S_IWUSR);
 module_param(channels,int, S_IRUGO|S_IWUSR);
@@ -7432,7 +7432,7 @@ static int __devinit rtl8192_usb_probe(struct usb_interface *intf,
 
 	if (dev_alloc_name(dev, ifname) < 0){
                 RT_TRACE(COMP_INIT, "Oops: devname already taken! Trying wlan%%d...\n");
-		ifname = "wlan%d";
+		strcpy(ifname, "wlan%d");
 		dev_alloc_name(dev, ifname);
         }
 
diff --git a/drivers/usb/atm/ueagle-atm.c b/drivers/usb/atm/ueagle-atm.c
index 25f01b536f67..bc62a2019b0d 100644
--- a/drivers/usb/atm/ueagle-atm.c
+++ b/drivers/usb/atm/ueagle-atm.c
@@ -1552,6 +1552,7 @@ static void cmvs_file_name(struct uea_softc *sc, char *const cmv_name, int ver)
 	char file_arr[] = "CMVxy.bin";
 	char *file;
 
+	kparam_block_sysfs_write(cmv_file);
 	/* set proper name corresponding modem version and line type */
 	if (cmv_file[sc->modem_index] == NULL) {
 		if (UEA_CHIP_VERSION(sc) == ADI930)
@@ -1570,6 +1571,7 @@ static void cmvs_file_name(struct uea_softc *sc, char *const cmv_name, int ver)
 	strlcat(cmv_name, file, UEA_FW_NAME_MAX);
 	if (ver == 2)
 		strlcat(cmv_name, ".v2", UEA_FW_NAME_MAX);
+	kparam_unblock_sysfs_write(cmv_file);
 }
 
 static int request_cmvs_old(struct uea_softc *sc,
diff --git a/drivers/video/uvesafb.c b/drivers/video/uvesafb.c
index 7b8839ebf3c4..52ec0959d462 100644
--- a/drivers/video/uvesafb.c
+++ b/drivers/video/uvesafb.c
@@ -1977,8 +1977,7 @@ static void __devexit uvesafb_exit(void)
 
 module_exit(uvesafb_exit);
 
-#define param_get_scroll NULL
-static int param_set_scroll(const char *val, struct kernel_param *kp)
+static int param_set_scroll(const char *val, const struct kernel_param *kp)
 {
 	ypan = 0;
 
@@ -1993,7 +1992,9 @@ static int param_set_scroll(const char *val, struct kernel_param *kp)
 
 	return 0;
 }
-
+static struct kernel_param_ops param_ops_scroll = {
+	.set = param_set_scroll,
+};
 #define param_check_scroll(name, p) __param_check(name, p, void)
 
 module_param_named(scroll, ypan, scroll, 0);
diff --git a/drivers/video/vt8623fb.c b/drivers/video/vt8623fb.c
index d31dc96f838a..85d76ec4c63e 100644
--- a/drivers/video/vt8623fb.c
+++ b/drivers/video/vt8623fb.c
@@ -726,7 +726,9 @@ static int __devinit vt8623_pci_probe(struct pci_dev *dev, const struct pci_devi
 
 	/* Prepare startup mode */
 
+	kparam_block_sysfs_write(mode_option);
 	rc = fb_find_mode(&(info->var), info, mode_option, NULL, 0, NULL, 8);
+	kparam_unblock_sysfs_write(mode_option);
 	if (! ((rc == 1) || (rc == 2))) {
 		rc = -EINVAL;
 		dev_err(info->device, "mode %s not found\n", mode_option);
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index bfec7c29486d..0f1da45ba47d 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -75,7 +75,7 @@ static void balloon_ack(struct virtqueue *vq)
 	struct virtio_balloon *vb;
 	unsigned int len;
 
-	vb = vq->vq_ops->get_buf(vq, &len);
+	vb = virtqueue_get_buf(vq, &len);
 	if (vb)
 		complete(&vb->acked);
 }
@@ -89,9 +89,9 @@ static void tell_host(struct virtio_balloon *vb, struct virtqueue *vq)
 	init_completion(&vb->acked);
 
 	/* We should always be able to add one buffer to an empty queue. */
-	if (vq->vq_ops->add_buf(vq, &sg, 1, 0, vb) < 0)
+	if (virtqueue_add_buf(vq, &sg, 1, 0, vb) < 0)
 		BUG();
-	vq->vq_ops->kick(vq);
+	virtqueue_kick(vq);
 
 	/* When host has read buffer, this completes via balloon_ack */
 	wait_for_completion(&vb->acked);
@@ -204,7 +204,7 @@ static void stats_request(struct virtqueue *vq)
 	struct virtio_balloon *vb;
 	unsigned int len;
 
-	vb = vq->vq_ops->get_buf(vq, &len);
+	vb = virtqueue_get_buf(vq, &len);
 	if (!vb)
 		return;
 	vb->need_stats_update = 1;
@@ -221,9 +221,9 @@ static void stats_handle_request(struct virtio_balloon *vb)
 
 	vq = vb->stats_vq;
 	sg_init_one(&sg, vb->stats, sizeof(vb->stats));
-	if (vq->vq_ops->add_buf(vq, &sg, 1, 0, vb) < 0)
+	if (virtqueue_add_buf(vq, &sg, 1, 0, vb) < 0)
 		BUG();
-	vq->vq_ops->kick(vq);
+	virtqueue_kick(vq);
 }
 
 static void virtballoon_changed(struct virtio_device *vdev)
@@ -314,10 +314,9 @@ static int virtballoon_probe(struct virtio_device *vdev)
 		 * use it to signal us later.
 		 */
 		sg_init_one(&sg, vb->stats, sizeof vb->stats);
-		if (vb->stats_vq->vq_ops->add_buf(vb->stats_vq,
-						  &sg, 1, 0, vb) < 0)
+		if (virtqueue_add_buf(vb->stats_vq, &sg, 1, 0, vb) < 0)
 			BUG();
-		vb->stats_vq->vq_ops->kick(vb->stats_vq);
+		virtqueue_kick(vb->stats_vq);
 	}
 
 	vb->thread = kthread_run(balloon, vb, "vballoon");
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index 0f90634bcb85..1ca88908723b 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -110,13 +110,14 @@ struct vring_virtqueue
 static int vring_add_indirect(struct vring_virtqueue *vq,
 			      struct scatterlist sg[],
 			      unsigned int out,
-			      unsigned int in)
+			      unsigned int in,
+			      gfp_t gfp)
 {
 	struct vring_desc *desc;
 	unsigned head;
 	int i;
 
-	desc = kmalloc((out + in) * sizeof(struct vring_desc), GFP_ATOMIC);
+	desc = kmalloc((out + in) * sizeof(struct vring_desc), gfp);
 	if (!desc)
 		return vq->vring.num;
 
@@ -155,11 +156,12 @@ static int vring_add_indirect(struct vring_virtqueue *vq,
 	return head;
 }
 
-static int vring_add_buf(struct virtqueue *_vq,
-			 struct scatterlist sg[],
-			 unsigned int out,
-			 unsigned int in,
-			 void *data)
+int virtqueue_add_buf_gfp(struct virtqueue *_vq,
+			  struct scatterlist sg[],
+			  unsigned int out,
+			  unsigned int in,
+			  void *data,
+			  gfp_t gfp)
 {
 	struct vring_virtqueue *vq = to_vvq(_vq);
 	unsigned int i, avail, head, uninitialized_var(prev);
@@ -171,7 +173,7 @@ static int vring_add_buf(struct virtqueue *_vq,
 	/* If the host supports indirect descriptor tables, and we have multiple
 	 * buffers, then go indirect. FIXME: tune this threshold */
 	if (vq->indirect && (out + in) > 1 && vq->num_free) {
-		head = vring_add_indirect(vq, sg, out, in);
+		head = vring_add_indirect(vq, sg, out, in, gfp);
 		if (head != vq->vring.num)
 			goto add_head;
 	}
@@ -232,8 +234,9 @@ add_head:
 		return vq->num_free ? vq->vring.num : 0;
 	return vq->num_free;
 }
+EXPORT_SYMBOL_GPL(virtqueue_add_buf_gfp);
 
-static void vring_kick(struct virtqueue *_vq)
+void virtqueue_kick(struct virtqueue *_vq)
 {
 	struct vring_virtqueue *vq = to_vvq(_vq);
 	START_USE(vq);
@@ -253,6 +256,7 @@ static void vring_kick(struct virtqueue *_vq)
 
 	END_USE(vq);
 }
+EXPORT_SYMBOL_GPL(virtqueue_kick);
 
 static void detach_buf(struct vring_virtqueue *vq, unsigned int head)
 {
@@ -284,7 +288,7 @@ static inline bool more_used(const struct vring_virtqueue *vq)
 	return vq->last_used_idx != vq->vring.used->idx;
 }
 
-static void *vring_get_buf(struct virtqueue *_vq, unsigned int *len)
+void *virtqueue_get_buf(struct virtqueue *_vq, unsigned int *len)
 {
 	struct vring_virtqueue *vq = to_vvq(_vq);
 	void *ret;
@@ -325,15 +329,17 @@ static void *vring_get_buf(struct virtqueue *_vq, unsigned int *len)
 	END_USE(vq);
 	return ret;
 }
+EXPORT_SYMBOL_GPL(virtqueue_get_buf);
 
-static void vring_disable_cb(struct virtqueue *_vq)
+void virtqueue_disable_cb(struct virtqueue *_vq)
 {
 	struct vring_virtqueue *vq = to_vvq(_vq);
 
 	vq->vring.avail->flags |= VRING_AVAIL_F_NO_INTERRUPT;
 }
+EXPORT_SYMBOL_GPL(virtqueue_disable_cb);
 
-static bool vring_enable_cb(struct virtqueue *_vq)
+bool virtqueue_enable_cb(struct virtqueue *_vq)
 {
 	struct vring_virtqueue *vq = to_vvq(_vq);
 
@@ -351,8 +357,9 @@ static bool vring_enable_cb(struct virtqueue *_vq)
 	END_USE(vq);
 	return true;
 }
+EXPORT_SYMBOL_GPL(virtqueue_enable_cb);
 
-static void *vring_detach_unused_buf(struct virtqueue *_vq)
+void *virtqueue_detach_unused_buf(struct virtqueue *_vq)
 {
 	struct vring_virtqueue *vq = to_vvq(_vq);
 	unsigned int i;
@@ -375,6 +382,7 @@ static void *vring_detach_unused_buf(struct virtqueue *_vq)
 	END_USE(vq);
 	return NULL;
 }
+EXPORT_SYMBOL_GPL(virtqueue_detach_unused_buf);
 
 irqreturn_t vring_interrupt(int irq, void *_vq)
 {
@@ -396,15 +404,6 @@ irqreturn_t vring_interrupt(int irq, void *_vq)
 }
 EXPORT_SYMBOL_GPL(vring_interrupt);
 
-static struct virtqueue_ops vring_vq_ops = {
-	.add_buf = vring_add_buf,
-	.get_buf = vring_get_buf,
-	.kick = vring_kick,
-	.disable_cb = vring_disable_cb,
-	.enable_cb = vring_enable_cb,
-	.detach_unused_buf = vring_detach_unused_buf,
-};
-
 struct virtqueue *vring_new_virtqueue(unsigned int num,
 				      unsigned int vring_align,
 				      struct virtio_device *vdev,
@@ -429,7 +428,6 @@ struct virtqueue *vring_new_virtqueue(unsigned int num,
 	vring_init(&vq->vring, num, pages, vring_align);
 	vq->vq.callback = callback;
 	vq->vq.vdev = vdev;
-	vq->vq.vq_ops = &vring_vq_ops;
 	vq->vq.name = name;
 	vq->notify = notify;
 	vq->broken = false;
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 36dfdae95123..e17b49e2eabd 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -45,7 +45,7 @@ unsigned short nfs_callback_tcpport;
 unsigned short nfs_callback_tcpport6;
 #define NFS_CALLBACK_MAXPORTNR (65535U)
 
-static int param_set_portnr(const char *val, struct kernel_param *kp)
+static int param_set_portnr(const char *val, const struct kernel_param *kp)
 {
 	unsigned long num;
 	int ret;
@@ -58,11 +58,10 @@ static int param_set_portnr(const char *val, struct kernel_param *kp)
 	*((unsigned int *)kp->arg) = num;
 	return 0;
 }
-
-static int param_get_portnr(char *buffer, struct kernel_param *kp)
-{
-	return param_get_uint(buffer, kp);
-}
+static struct kernel_param_ops param_ops_portnr = {
+	.set = param_set_portnr,
+	.get = param_get_uint,
+};
 #define param_check_portnr(name, p) __param_check(name, p, unsigned int);
 
 module_param_named(callback_tcpport, nfs_callback_set_tcpport, portnr, 0644);
diff --git a/include/linux/isapnp.h b/include/linux/isapnp.h
index cd5a269fdb5e..e2d28b026a8c 100644
--- a/include/linux/isapnp.h
+++ b/include/linux/isapnp.h
@@ -43,10 +43,10 @@
  */
 
 #ifdef __KERNEL__
+#include <linux/mod_devicetable.h>
 
 #define DEVICE_COUNT_COMPATIBLE 4
 
-#define ISAPNP_ANY_ID		0xffff
 #define ISAPNP_CARD_DEVS	8
 
 #define ISAPNP_CARD_ID(_va, _vb, _vc, _device) \
@@ -74,12 +74,6 @@ struct isapnp_card_id {
 #define ISAPNP_DEVICE_SINGLE_END \
 		.card_vendor = 0, .card_device = 0
 
-struct isapnp_device_id {
-	unsigned short card_vendor, card_device;
-	unsigned short vendor, function;
-	unsigned long driver_data;	/* data private to the driver */
-};
-
 #if defined(CONFIG_ISAPNP) || (defined(CONFIG_ISAPNP_MODULE) && defined(MODULE))
 
 #define __ISAPNP__
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 55f1f9c9506c..529e34b661af 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -500,4 +500,11 @@ struct mdio_device_id {
 	__u32 phy_id_mask;
 };
 
+#define ISAPNP_ANY_ID		0xffff
+struct isapnp_device_id {
+	unsigned short card_vendor, card_device;
+	unsigned short vendor, function;
+	kernel_ulong_t driver_data;	/* data private to the driver */
+};
+
 #endif /* LINUX_MOD_DEVICETABLE_H */
diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h
index 82a9124f7d75..893549c04265 100644
--- a/include/linux/moduleparam.h
+++ b/include/linux/moduleparam.h
@@ -31,20 +31,23 @@ static const char __module_cat(name,__LINE__)[]				  \
 
 struct kernel_param;
 
-/* Returns 0, or -errno.  arg is in kp->arg. */
-typedef int (*param_set_fn)(const char *val, struct kernel_param *kp);
-/* Returns length written or -errno.  Buffer is 4k (ie. be short!) */
-typedef int (*param_get_fn)(char *buffer, struct kernel_param *kp);
+struct kernel_param_ops {
+	/* Returns 0, or -errno.  arg is in kp->arg. */
+	int (*set)(const char *val, const struct kernel_param *kp);
+	/* Returns length written or -errno.  Buffer is 4k (ie. be short!) */
+	int (*get)(char *buffer, const struct kernel_param *kp);
+	/* Optional function to free kp->arg when module unloaded. */
+	void (*free)(void *arg);
+};
 
 /* Flag bits for kernel_param.flags */
 #define KPARAM_ISBOOL		2
 
 struct kernel_param {
 	const char *name;
+	const struct kernel_param_ops *ops;
 	u16 perm;
 	u16 flags;
-	param_set_fn set;
-	param_get_fn get;
 	union {
 		void *arg;
 		const struct kparam_string *str;
@@ -63,12 +66,67 @@ struct kparam_array
 {
 	unsigned int max;
 	unsigned int *num;
-	param_set_fn set;
-	param_get_fn get;
+	const struct kernel_param_ops *ops;
 	unsigned int elemsize;
 	void *elem;
 };
 
+/**
+ * module_param - typesafe helper for a module/cmdline parameter
+ * @value: the variable to alter, and exposed parameter name.
+ * @type: the type of the parameter
+ * @perm: visibility in sysfs.
+ *
+ * @value becomes the module parameter, or (prefixed by KBUILD_MODNAME and a
+ * ".") the kernel commandline parameter.  Note that - is changed to _, so
+ * the user can use "foo-bar=1" even for variable "foo_bar".
+ *
+ * @perm is 0 if the the variable is not to appear in sysfs, or 0444
+ * for world-readable, 0644 for root-writable, etc.  Note that if it
+ * is writable, you may need to use kparam_block_sysfs_write() around
+ * accesses (esp. charp, which can be kfreed when it changes).
+ *
+ * The @type is simply pasted to refer to a param_ops_##type and a
+ * param_check_##type: for convenience many standard types are provided but
+ * you can create your own by defining those variables.
+ *
+ * Standard types are:
+ *	byte, short, ushort, int, uint, long, ulong
+ *	charp: a character pointer
+ *	bool: a bool, values 0/1, y/n, Y/N.
+ *	invbool: the above, only sense-reversed (N = true).
+ */
+#define module_param(name, type, perm)				\
+	module_param_named(name, name, type, perm)
+
+/**
+ * module_param_named - typesafe helper for a renamed module/cmdline parameter
+ * @name: a valid C identifier which is the parameter name.
+ * @value: the actual lvalue to alter.
+ * @type: the type of the parameter
+ * @perm: visibility in sysfs.
+ *
+ * Usually it's a good idea to have variable names and user-exposed names the
+ * same, but that's harder if the variable must be non-static or is inside a
+ * structure.  This allows exposure under a different name.
+ */
+#define module_param_named(name, value, type, perm)			   \
+	param_check_##type(name, &(value));				   \
+	module_param_cb(name, &param_ops_##type, &value, perm);		   \
+	__MODULE_PARM_TYPE(name, #type)
+
+/**
+ * module_param_cb - general callback for a module/cmdline parameter
+ * @name: a valid C identifier which is the parameter name.
+ * @ops: the set & get operations for this parameter.
+ * @perm: visibility in sysfs.
+ *
+ * The ops can have NULL set or get functions.
+ */
+#define module_param_cb(name, ops, arg, perm)				      \
+	__module_param_call(MODULE_PARAM_PREFIX,			      \
+			    name, ops, arg, __same_type(*(arg), bool), perm)
+
 /* On alpha, ia64 and ppc64 relocations to global data cannot go into
    read-only sections (which is part of respective UNIX ABI on these
    platforms). So 'const' makes no sense and even causes compile failures
@@ -80,10 +138,8 @@ struct kparam_array
 #endif
 
 /* This is the fundamental function for registering boot/module
-   parameters.  perm sets the visibility in sysfs: 000 means it's
-   not there, read bits mean it's readable, write bits mean it's
-   writable. */
-#define __module_param_call(prefix, name, set, get, arg, isbool, perm)	\
+   parameters. */
+#define __module_param_call(prefix, name, ops, arg, isbool, perm)	\
 	/* Default value instead of permissions? */			\
 	static int __param_perm_check_##name __attribute__((unused)) =	\
 	BUILD_BUG_ON_ZERO((perm) < 0 || (perm) > 0777 || ((perm) & 2))	\
@@ -92,31 +148,87 @@ struct kparam_array
 	static struct kernel_param __moduleparam_const __param_##name	\
 	__used								\
     __attribute__ ((unused,__section__ ("__param"),aligned(sizeof(void *)))) \
-	= { __param_str_##name, perm, isbool ? KPARAM_ISBOOL : 0,	\
-	    set, get, { arg } }
+	= { __param_str_##name, ops, perm, isbool ? KPARAM_ISBOOL : 0,	\
+	    { arg } }
+
+/* Obsolete - use module_param_cb() */
+#define module_param_call(name, set, get, arg, perm)			\
+	static struct kernel_param_ops __param_ops_##name =		\
+		 { (void *)set, (void *)get };				\
+	__module_param_call(MODULE_PARAM_PREFIX,			\
+			    name, &__param_ops_##name, arg,		\
+			    __same_type(*(arg), bool),			\
+			    (perm) + sizeof(__check_old_set_param(set))*0)
+
+/* We don't get oldget: it's often a new-style param_get_uint, etc. */
+static inline int
+__check_old_set_param(int (*oldset)(const char *, struct kernel_param *))
+{
+	return 0;
+}
 
-#define module_param_call(name, set, get, arg, perm)			      \
-	__module_param_call(MODULE_PARAM_PREFIX,			      \
-			    name, set, get, arg,			      \
-			    __same_type(*(arg), bool), perm)
+/**
+ * kparam_block_sysfs_write - make sure a parameter isn't written via sysfs.
+ * @name: the name of the parameter
+ *
+ * There's no point blocking write on a paramter that isn't writable via sysfs!
+ */
+#define kparam_block_sysfs_write(name)			\
+	do {						\
+		BUG_ON(!(__param_##name.perm & 0222));	\
+		__kernel_param_lock();			\
+	} while (0)
 
-/* Helper functions: type is byte, short, ushort, int, uint, long,
-   ulong, charp, bool or invbool, or XXX if you define param_get_XXX,
-   param_set_XXX and param_check_XXX. */
-#define module_param_named(name, value, type, perm)			   \
-	param_check_##type(name, &(value));				   \
-	module_param_call(name, param_set_##type, param_get_##type, &value, perm); \
-	__MODULE_PARM_TYPE(name, #type)
+/**
+ * kparam_unblock_sysfs_write - allows sysfs to write to a parameter again.
+ * @name: the name of the parameter
+ */
+#define kparam_unblock_sysfs_write(name)		\
+	do {						\
+		BUG_ON(!(__param_##name.perm & 0222));	\
+		__kernel_param_unlock();		\
+	} while (0)
 
-#define module_param(name, type, perm)				\
-	module_param_named(name, name, type, perm)
+/**
+ * kparam_block_sysfs_read - make sure a parameter isn't read via sysfs.
+ * @name: the name of the parameter
+ *
+ * This also blocks sysfs writes.
+ */
+#define kparam_block_sysfs_read(name)			\
+	do {						\
+		BUG_ON(!(__param_##name.perm & 0444));	\
+		__kernel_param_lock();			\
+	} while (0)
+
+/**
+ * kparam_unblock_sysfs_read - allows sysfs to read a parameter again.
+ * @name: the name of the parameter
+ */
+#define kparam_unblock_sysfs_read(name)			\
+	do {						\
+		BUG_ON(!(__param_##name.perm & 0444));	\
+		__kernel_param_unlock();		\
+	} while (0)
+
+#ifdef CONFIG_SYSFS
+extern void __kernel_param_lock(void);
+extern void __kernel_param_unlock(void);
+#else
+static inline void __kernel_param_lock(void)
+{
+}
+static inline void __kernel_param_unlock(void)
+{
+}
+#endif
 
 #ifndef MODULE
 /**
  * core_param - define a historical core kernel parameter.
  * @name: the name of the cmdline and sysfs parameter (often the same as var)
  * @var: the variable
- * @type: the type (for param_set_##type and param_get_##type)
+ * @type: the type of the parameter
  * @perm: visibility in sysfs
  *
  * core_param is just like module_param(), but cannot be modular and
@@ -126,23 +238,32 @@ struct kparam_array
  */
 #define core_param(name, var, type, perm)				\
 	param_check_##type(name, &(var));				\
-	__module_param_call("", name, param_set_##type, param_get_##type, \
+	__module_param_call("", name, &param_ops_##type,		\
 			    &var, __same_type(var, bool), perm)
 #endif /* !MODULE */
 
-/* Actually copy string: maxlen param is usually sizeof(string). */
+/**
+ * module_param_string - a char array parameter
+ * @name: the name of the parameter
+ * @string: the string variable
+ * @len: the maximum length of the string, incl. terminator
+ * @perm: visibility in sysfs.
+ *
+ * This actually copies the string when it's set (unlike type charp).
+ * @len is usually just sizeof(string).
+ */
 #define module_param_string(name, string, len, perm)			\
 	static const struct kparam_string __param_string_##name		\
 		= { len, string };					\
 	__module_param_call(MODULE_PARAM_PREFIX, name,			\
-			    param_set_copystring, param_get_string,	\
+			    &param_ops_string,				\
 			    .str = &__param_string_##name, 0, perm);	\
 	__MODULE_PARM_TYPE(name, "string")
 
 /* Called on module insert or kernel boot */
 extern int parse_args(const char *name,
 		      char *args,
-		      struct kernel_param *params,
+		      const struct kernel_param *params,
 		      unsigned num,
 		      int (*unknown)(char *param, char *val));
 
@@ -162,41 +283,50 @@ static inline void destroy_params(const struct kernel_param *params,
 #define __param_check(name, p, type) \
 	static inline type *__check_##name(void) { return(p); }
 
-extern int param_set_byte(const char *val, struct kernel_param *kp);
-extern int param_get_byte(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_byte;
+extern int param_set_byte(const char *val, const struct kernel_param *kp);
+extern int param_get_byte(char *buffer, const struct kernel_param *kp);
 #define param_check_byte(name, p) __param_check(name, p, unsigned char)
 
-extern int param_set_short(const char *val, struct kernel_param *kp);
-extern int param_get_short(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_short;
+extern int param_set_short(const char *val, const struct kernel_param *kp);
+extern int param_get_short(char *buffer, const struct kernel_param *kp);
 #define param_check_short(name, p) __param_check(name, p, short)
 
-extern int param_set_ushort(const char *val, struct kernel_param *kp);
-extern int param_get_ushort(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_ushort;
+extern int param_set_ushort(const char *val, const struct kernel_param *kp);
+extern int param_get_ushort(char *buffer, const struct kernel_param *kp);
 #define param_check_ushort(name, p) __param_check(name, p, unsigned short)
 
-extern int param_set_int(const char *val, struct kernel_param *kp);
-extern int param_get_int(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_int;
+extern int param_set_int(const char *val, const struct kernel_param *kp);
+extern int param_get_int(char *buffer, const struct kernel_param *kp);
 #define param_check_int(name, p) __param_check(name, p, int)
 
-extern int param_set_uint(const char *val, struct kernel_param *kp);
-extern int param_get_uint(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_uint;
+extern int param_set_uint(const char *val, const struct kernel_param *kp);
+extern int param_get_uint(char *buffer, const struct kernel_param *kp);
 #define param_check_uint(name, p) __param_check(name, p, unsigned int)
 
-extern int param_set_long(const char *val, struct kernel_param *kp);
-extern int param_get_long(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_long;
+extern int param_set_long(const char *val, const struct kernel_param *kp);
+extern int param_get_long(char *buffer, const struct kernel_param *kp);
 #define param_check_long(name, p) __param_check(name, p, long)
 
-extern int param_set_ulong(const char *val, struct kernel_param *kp);
-extern int param_get_ulong(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_ulong;
+extern int param_set_ulong(const char *val, const struct kernel_param *kp);
+extern int param_get_ulong(char *buffer, const struct kernel_param *kp);
 #define param_check_ulong(name, p) __param_check(name, p, unsigned long)
 
-extern int param_set_charp(const char *val, struct kernel_param *kp);
-extern int param_get_charp(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_charp;
+extern int param_set_charp(const char *val, const struct kernel_param *kp);
+extern int param_get_charp(char *buffer, const struct kernel_param *kp);
 #define param_check_charp(name, p) __param_check(name, p, char *)
 
 /* For historical reasons "bool" parameters can be (unsigned) "int". */
-extern int param_set_bool(const char *val, struct kernel_param *kp);
-extern int param_get_bool(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_bool;
+extern int param_set_bool(const char *val, const struct kernel_param *kp);
+extern int param_get_bool(char *buffer, const struct kernel_param *kp);
 #define param_check_bool(name, p)					\
 	static inline void __check_##name(void)				\
 	{								\
@@ -205,29 +335,53 @@ extern int param_get_bool(char *buffer, struct kernel_param *kp);
 			     !__same_type(*(p), int));			\
 	}
 
-extern int param_set_invbool(const char *val, struct kernel_param *kp);
-extern int param_get_invbool(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_invbool;
+extern int param_set_invbool(const char *val, const struct kernel_param *kp);
+extern int param_get_invbool(char *buffer, const struct kernel_param *kp);
 #define param_check_invbool(name, p) __param_check(name, p, bool)
 
-/* Comma-separated array: *nump is set to number they actually specified. */
+/**
+ * module_param_array - a parameter which is an array of some type
+ * @name: the name of the array variable
+ * @type: the type, as per module_param()
+ * @nump: optional pointer filled in with the number written
+ * @perm: visibility in sysfs
+ *
+ * Input and output are as comma-separated values.  Commas inside values
+ * don't work properly (eg. an array of charp).
+ *
+ * ARRAY_SIZE(@name) is used to determine the number of elements in the
+ * array, so the definition must be visible.
+ */
+#define module_param_array(name, type, nump, perm)		\
+	module_param_array_named(name, name, type, nump, perm)
+
+/**
+ * module_param_array_named - renamed parameter which is an array of some type
+ * @name: a valid C identifier which is the parameter name
+ * @array: the name of the array variable
+ * @type: the type, as per module_param()
+ * @nump: optional pointer filled in with the number written
+ * @perm: visibility in sysfs
+ *
+ * This exposes a different name than the actual variable name.  See
+ * module_param_named() for why this might be necessary.
+ */
 #define module_param_array_named(name, array, type, nump, perm)		\
 	static const struct kparam_array __param_arr_##name		\
-	= { ARRAY_SIZE(array), nump, param_set_##type, param_get_##type,\
+	= { ARRAY_SIZE(array), nump, &param_ops_##type,			\
 	    sizeof(array[0]), array };					\
 	__module_param_call(MODULE_PARAM_PREFIX, name,			\
-			    param_array_set, param_array_get,		\
+			    &param_array_ops,				\
 			    .arr = &__param_arr_##name,			\
 			    __same_type(array[0], bool), perm);		\
 	__MODULE_PARM_TYPE(name, "array of " #type)
 
-#define module_param_array(name, type, nump, perm)		\
-	module_param_array_named(name, name, type, nump, perm)
-
-extern int param_array_set(const char *val, struct kernel_param *kp);
-extern int param_array_get(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_array_ops;
 
-extern int param_set_copystring(const char *val, struct kernel_param *kp);
-extern int param_get_string(char *buffer, struct kernel_param *kp);
+extern struct kernel_param_ops param_ops_string;
+extern int param_set_copystring(const char *val, const struct kernel_param *);
+extern int param_get_string(char *buffer, const struct kernel_param *kp);
 
 /* for exporting parameters in /sys/parameters */
 
@@ -235,13 +389,13 @@ struct module;
 
 #if defined(CONFIG_SYSFS) && defined(CONFIG_MODULES)
 extern int module_param_sysfs_setup(struct module *mod,
-				    struct kernel_param *kparam,
+				    const struct kernel_param *kparam,
 				    unsigned int num_params);
 
 extern void module_param_sysfs_remove(struct module *mod);
 #else
 static inline int module_param_sysfs_setup(struct module *mod,
-			     struct kernel_param *kparam,
+			     const struct kernel_param *kparam,
 			     unsigned int num_params)
 {
 	return 0;
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index 40d1709bdbf4..aff5b4f74041 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -7,6 +7,7 @@
 #include <linux/spinlock.h>
 #include <linux/device.h>
 #include <linux/mod_devicetable.h>
+#include <linux/gfp.h>
 
 /**
  * virtqueue - a queue to register buffers for sending or receiving.
@@ -14,7 +15,6 @@
  * @callback: the function to call when buffers are consumed (can be NULL).
  * @name: the name of this virtqueue (mainly for debugging)
  * @vdev: the virtio device this queue was created for.
- * @vq_ops: the operations for this virtqueue (see below).
  * @priv: a pointer for the virtqueue implementation to use.
  */
 struct virtqueue {
@@ -22,60 +22,71 @@ struct virtqueue {
 	void (*callback)(struct virtqueue *vq);
 	const char *name;
 	struct virtio_device *vdev;
-	struct virtqueue_ops *vq_ops;
 	void *priv;
 };
 
 /**
- * virtqueue_ops - operations for virtqueue abstraction layer
- * @add_buf: expose buffer to other end
+ * operations for virtqueue
+ * virtqueue_add_buf: expose buffer to other end
  *	vq: the struct virtqueue we're talking about.
  *	sg: the description of the buffer(s).
  *	out_num: the number of sg readable by other side
  *	in_num: the number of sg which are writable (after readable ones)
  *	data: the token identifying the buffer.
+ *	gfp: how to do memory allocations (if necessary).
  *      Returns remaining capacity of queue (sg segments) or a negative error.
- * @kick: update after add_buf
+ * virtqueue_kick: update after add_buf
  *	vq: the struct virtqueue
  *	After one or more add_buf calls, invoke this to kick the other side.
- * @get_buf: get the next used buffer
+ * virtqueue_get_buf: get the next used buffer
  *	vq: the struct virtqueue we're talking about.
  *	len: the length written into the buffer
  *	Returns NULL or the "data" token handed to add_buf.
- * @disable_cb: disable callbacks
+ * virtqueue_disable_cb: disable callbacks
  *	vq: the struct virtqueue we're talking about.
  *	Note that this is not necessarily synchronous, hence unreliable and only
  *	useful as an optimization.
- * @enable_cb: restart callbacks after disable_cb.
+ * virtqueue_enable_cb: restart callbacks after disable_cb.
  *	vq: the struct virtqueue we're talking about.
  *	This re-enables callbacks; it returns "false" if there are pending
  *	buffers in the queue, to detect a possible race between the driver
  *	checking for more work, and enabling callbacks.
- * @detach_unused_buf: detach first unused buffer
+ * virtqueue_detach_unused_buf: detach first unused buffer
  * 	vq: the struct virtqueue we're talking about.
  * 	Returns NULL or the "data" token handed to add_buf
  *
  * Locking rules are straightforward: the driver is responsible for
  * locking.  No two operations may be invoked simultaneously, with the exception
- * of @disable_cb.
+ * of virtqueue_disable_cb.
  *
  * All operations can be called in any context.
  */
-struct virtqueue_ops {
-	int (*add_buf)(struct virtqueue *vq,
-		       struct scatterlist sg[],
-		       unsigned int out_num,
-		       unsigned int in_num,
-		       void *data);
 
-	void (*kick)(struct virtqueue *vq);
+int virtqueue_add_buf_gfp(struct virtqueue *vq,
+			  struct scatterlist sg[],
+			  unsigned int out_num,
+			  unsigned int in_num,
+			  void *data,
+			  gfp_t gfp);
 
-	void *(*get_buf)(struct virtqueue *vq, unsigned int *len);
+static inline int virtqueue_add_buf(struct virtqueue *vq,
+				    struct scatterlist sg[],
+				    unsigned int out_num,
+				    unsigned int in_num,
+				    void *data)
+{
+	return virtqueue_add_buf_gfp(vq, sg, out_num, in_num, data, GFP_ATOMIC);
+}
 
-	void (*disable_cb)(struct virtqueue *vq);
-	bool (*enable_cb)(struct virtqueue *vq);
-	void *(*detach_unused_buf)(struct virtqueue *vq);
-};
+void virtqueue_kick(struct virtqueue *vq);
+
+void *virtqueue_get_buf(struct virtqueue *vq, unsigned int *len);
+
+void virtqueue_disable_cb(struct virtqueue *vq);
+
+bool virtqueue_enable_cb(struct virtqueue *vq);
+
+void *virtqueue_detach_unused_buf(struct virtqueue *vq);
 
 /**
  * virtio_device - representation of a device using virtio
diff --git a/include/linux/virtio_blk.h b/include/linux/virtio_blk.h
index e52029e98919..167720d695ed 100644
--- a/include/linux/virtio_blk.h
+++ b/include/linux/virtio_blk.h
@@ -17,6 +17,8 @@
 #define VIRTIO_BLK_F_FLUSH	9	/* Cache flush command support */
 #define VIRTIO_BLK_F_TOPOLOGY	10	/* Topology information is available */
 
+#define VIRTIO_BLK_ID_BYTES	20	/* ID string length */
+
 struct virtio_blk_config {
 	/* The capacity (in 512-byte sectors). */
 	__u64 capacity;
@@ -67,6 +69,9 @@ struct virtio_blk_config {
 /* Cache flush command */
 #define VIRTIO_BLK_T_FLUSH	4
 
+/* Get device ID command */
+#define VIRTIO_BLK_T_GET_ID    8
+
 /* Barrier before this op. */
 #define VIRTIO_BLK_T_BARRIER	0x80000000
 
diff --git a/include/linux/virtio_console.h b/include/linux/virtio_console.h
index 92228a8fbcbc..a85064db8f94 100644
--- a/include/linux/virtio_console.h
+++ b/include/linux/virtio_console.h
@@ -12,14 +12,39 @@
 
 /* Feature bits */
 #define VIRTIO_CONSOLE_F_SIZE	0	/* Does host provide console size? */
+#define VIRTIO_CONSOLE_F_MULTIPORT 1	/* Does host provide multiple ports? */
+
+#define VIRTIO_CONSOLE_BAD_ID		(~(u32)0)
 
 struct virtio_console_config {
 	/* colums of the screens */
 	__u16 cols;
 	/* rows of the screens */
 	__u16 rows;
+	/* max. number of ports this device can hold */
+	__u32 max_nr_ports;
 } __attribute__((packed));
 
+/*
+ * A message that's passed between the Host and the Guest for a
+ * particular port.
+ */
+struct virtio_console_control {
+	__u32 id;		/* Port number */
+	__u16 event;		/* The kind of control event (see below) */
+	__u16 value;		/* Extra information for the key */
+};
+
+/* Some events for control messages */
+#define VIRTIO_CONSOLE_DEVICE_READY	0
+#define VIRTIO_CONSOLE_PORT_ADD		1
+#define VIRTIO_CONSOLE_PORT_REMOVE	2
+#define VIRTIO_CONSOLE_PORT_READY	3
+#define VIRTIO_CONSOLE_CONSOLE_PORT	4
+#define VIRTIO_CONSOLE_RESIZE		5
+#define VIRTIO_CONSOLE_PORT_OPEN	6
+#define VIRTIO_CONSOLE_PORT_NAME	7
+
 #ifdef __KERNEL__
 int __init virtio_cons_early_init(int (*put_chars)(u32, const char *, int));
 #endif /* __KERNEL__ */
diff --git a/init/main.c b/init/main.c
index 5c8540271529..f3d20418fc80 100644
--- a/init/main.c
+++ b/init/main.c
@@ -201,11 +201,11 @@ static char * argv_init[MAX_INIT_ARGS+2] = { "init", NULL, };
 char * envp_init[MAX_INIT_ENVS+2] = { "HOME=/", "TERM=linux", NULL, };
 static const char *panic_later, *panic_param;
 
-extern struct obs_kernel_param __setup_start[], __setup_end[];
+extern const struct obs_kernel_param __setup_start[], __setup_end[];
 
 static int __init obsolete_checksetup(char *line)
 {
-	struct obs_kernel_param *p;
+	const struct obs_kernel_param *p;
 	int had_early_param = 0;
 
 	p = __setup_start;
@@ -451,7 +451,7 @@ static noinline void __init_refok rest_init(void)
 /* Check for early params. */
 static int __init do_early_param(char *param, char *val)
 {
-	struct obs_kernel_param *p;
+	const struct obs_kernel_param *p;
 
 	for (p = __setup_start; p < __setup_end; p++) {
 		if ((p->early && strcmp(param, p->str) == 0) ||
@@ -528,7 +528,7 @@ static void __init mm_init(void)
 asmlinkage void __init start_kernel(void)
 {
 	char * command_line;
-	extern struct kernel_param __start___param[], __stop___param[];
+	extern const struct kernel_param __start___param[], __stop___param[];
 
 	smp_setup_processor_id();
 
diff --git a/kernel/module.c b/kernel/module.c
index 738e2b3ed935..20e69c153fd0 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -560,33 +560,26 @@ int use_module(struct module *a, struct module *b)
 	struct module_use *use;
 	int no_warn, err;
 
-	if (b == NULL || already_uses(a, b)) return 1;
-
-	/* If we're interrupted or time out, we fail. */
-	if (wait_event_interruptible_timeout(
-		    module_wq, (err = strong_try_module_get(b)) != -EBUSY,
-		    30 * HZ) <= 0) {
-		printk("%s: gave up waiting for init of module %s.\n",
-		       a->name, b->name);
+	if (b == NULL || already_uses(a, b))
 		return 0;
-	}
 
-	/* If strong_try_module_get() returned a different error, we fail. */
+	/* If we're interrupted or time out, we fail. */
+	err = strong_try_module_get(b);
 	if (err)
-		return 0;
+		return err;
 
 	DEBUGP("Allocating new usage for %s.\n", a->name);
 	use = kmalloc(sizeof(*use), GFP_ATOMIC);
 	if (!use) {
 		printk("%s: out of memory loading\n", a->name);
 		module_put(b);
-		return 0;
+		return -ENOMEM;
 	}
 
 	use->module_which_uses = a;
 	list_add(&use->list, &b->modules_which_use_me);
 	no_warn = sysfs_create_link(b->holders_dir, &a->mkobj.kobj, a->name);
-	return 1;
+	return 0;
 }
 EXPORT_SYMBOL_GPL(use_module);
 
@@ -890,7 +883,7 @@ static inline void module_unload_free(struct module *mod)
 
 int use_module(struct module *a, struct module *b)
 {
-	return strong_try_module_get(b) == 0;
+	return strong_try_module_get(b);
 }
 EXPORT_SYMBOL_GPL(use_module);
 
@@ -1061,17 +1054,39 @@ static const struct kernel_symbol *resolve_symbol(Elf_Shdr *sechdrs,
 	struct module *owner;
 	const struct kernel_symbol *sym;
 	const unsigned long *crc;
+	DEFINE_WAIT(wait);
+	int err;
+	long timeleft = 30 * HZ;
 
+again:
 	sym = find_symbol(name, &owner, &crc,
 			  !(mod->taints & (1 << TAINT_PROPRIETARY_MODULE)), true);
-	/* use_module can fail due to OOM,
-	   or module initialization or unloading */
-	if (sym) {
-		if (!check_version(sechdrs, versindex, name, mod, crc, owner)
-		    || !use_module(mod, owner))
-			sym = NULL;
-	}
-	return sym;
+	if (!sym)
+		return NULL;
+
+	if (!check_version(sechdrs, versindex, name, mod, crc, owner))
+		return NULL;
+
+	prepare_to_wait(&module_wq, &wait, TASK_INTERRUPTIBLE);
+	err = use_module(mod, owner);
+	if (likely(!err) || err != -EBUSY || signal_pending(current)) {
+		finish_wait(&module_wq, &wait);
+		return err ? NULL : sym;
+	}
+
+	/* Module is still loading.  Drop lock and wait. */
+	mutex_unlock(&module_mutex);
+	timeleft = schedule_timeout(timeleft);
+	mutex_lock(&module_mutex);
+	finish_wait(&module_wq, &wait);
+
+	/* Module might be gone entirely, or replaced.  Re-lookup. */
+	if (timeleft)
+		goto again;
+
+	printk(KERN_WARNING "%s: gave up waiting for init of module %s.\n",
+	       mod->name, owner->name);
+	return NULL;
 }
 
 /*
diff --git a/kernel/params.c b/kernel/params.c
index 0b30ecd53a52..08107d181758 100644
--- a/kernel/params.c
+++ b/kernel/params.c
@@ -31,6 +31,42 @@
 #define DEBUGP(fmt, a...)
 #endif
 
+/* Protects all parameters, and incidentally kmalloced_param list. */
+static DEFINE_MUTEX(param_lock);
+
+/* This just allows us to keep track of which parameters are kmalloced. */
+struct kmalloced_param {
+	struct list_head list;
+	char val[];
+};
+static LIST_HEAD(kmalloced_params);
+
+static void *kmalloc_parameter(unsigned int size)
+{
+	struct kmalloced_param *p;
+
+	p = kmalloc(sizeof(*p) + size, GFP_KERNEL);
+	if (!p)
+		return NULL;
+
+	list_add(&p->list, &kmalloced_params);
+	return p->val;
+}
+
+/* Does nothing if parameter wasn't kmalloced above. */
+static void maybe_kfree_parameter(void *param)
+{
+	struct kmalloced_param *p;
+
+	list_for_each_entry(p, &kmalloced_params, list) {
+		if (p->val == param) {
+			list_del(&p->list);
+			kfree(p);
+			break;
+		}
+	}
+}
+
 static inline char dash2underscore(char c)
 {
 	if (c == '-')
@@ -49,18 +85,25 @@ static inline int parameq(const char *input, const char *paramname)
 
 static int parse_one(char *param,
 		     char *val,
-		     struct kernel_param *params, 
+		     const struct kernel_param *params,
 		     unsigned num_params,
 		     int (*handle_unknown)(char *param, char *val))
 {
 	unsigned int i;
+	int err;
 
 	/* Find parameter */
 	for (i = 0; i < num_params; i++) {
 		if (parameq(param, params[i].name)) {
+			/* Noone handled NULL, so do it here. */
+			if (!val && params[i].ops->set != param_set_bool)
+				return -EINVAL;
 			DEBUGP("They are equal!  Calling %p\n",
-			       params[i].set);
-			return params[i].set(val, &params[i]);
+			       params[i].ops->set);
+			mutex_lock(&param_lock);
+			err = params[i].ops->set(val, &params[i]);
+			mutex_unlock(&param_lock);
+			return err;
 		}
 	}
 
@@ -128,7 +171,7 @@ static char *next_arg(char *args, char **param, char **val)
 /* Args looks like "foo=bar,bar2 baz=fuz wiz". */
 int parse_args(const char *name,
 	       char *args,
-	       struct kernel_param *params,
+	       const struct kernel_param *params,
 	       unsigned num,
 	       int (*unknown)(char *param, char *val))
 {
@@ -176,22 +219,29 @@ int parse_args(const char *name,
 
 /* Lazy bastard, eh? */
 #define STANDARD_PARAM_DEF(name, type, format, tmptype, strtolfn)      	\
-	int param_set_##name(const char *val, struct kernel_param *kp)	\
+	int param_set_##name(const char *val, const struct kernel_param *kp) \
 	{								\
 		tmptype l;						\
 		int ret;						\
 									\
-		if (!val) return -EINVAL;				\
 		ret = strtolfn(val, 0, &l);				\
 		if (ret == -EINVAL || ((type)l != l))			\
 			return -EINVAL;					\
 		*((type *)kp->arg) = l;					\
 		return 0;						\
 	}								\
-	int param_get_##name(char *buffer, struct kernel_param *kp)	\
+	int param_get_##name(char *buffer, const struct kernel_param *kp) \
 	{								\
 		return sprintf(buffer, format, *((type *)kp->arg));	\
-	}
+	}								\
+	struct kernel_param_ops param_ops_##name = {			\
+		.set = param_set_##name,				\
+		.get = param_get_##name,				\
+	};								\
+	EXPORT_SYMBOL(param_set_##name);				\
+	EXPORT_SYMBOL(param_get_##name);				\
+	EXPORT_SYMBOL(param_ops_##name)
+
 
 STANDARD_PARAM_DEF(byte, unsigned char, "%c", unsigned long, strict_strtoul);
 STANDARD_PARAM_DEF(short, short, "%hi", long, strict_strtol);
@@ -201,39 +251,50 @@ STANDARD_PARAM_DEF(uint, unsigned int, "%u", unsigned long, strict_strtoul);
 STANDARD_PARAM_DEF(long, long, "%li", long, strict_strtol);
 STANDARD_PARAM_DEF(ulong, unsigned long, "%lu", unsigned long, strict_strtoul);
 
-int param_set_charp(const char *val, struct kernel_param *kp)
+int param_set_charp(const char *val, const struct kernel_param *kp)
 {
-	if (!val) {
-		printk(KERN_ERR "%s: string parameter expected\n",
-		       kp->name);
-		return -EINVAL;
-	}
-
 	if (strlen(val) > 1024) {
 		printk(KERN_ERR "%s: string parameter too long\n",
 		       kp->name);
 		return -ENOSPC;
 	}
 
-	/* This is a hack.  We can't need to strdup in early boot, and we
+	maybe_kfree_parameter(*(char **)kp->arg);
+
+	/* This is a hack.  We can't kmalloc in early boot, and we
 	 * don't need to; this mangled commandline is preserved. */
 	if (slab_is_available()) {
-		*(char **)kp->arg = kstrdup(val, GFP_KERNEL);
+		*(char **)kp->arg = kmalloc_parameter(strlen(val)+1);
 		if (!*(char **)kp->arg)
 			return -ENOMEM;
+		strcpy(*(char **)kp->arg, val);
 	} else
 		*(const char **)kp->arg = val;
 
 	return 0;
 }
+EXPORT_SYMBOL(param_set_charp);
 
-int param_get_charp(char *buffer, struct kernel_param *kp)
+int param_get_charp(char *buffer, const struct kernel_param *kp)
 {
 	return sprintf(buffer, "%s", *((char **)kp->arg));
 }
+EXPORT_SYMBOL(param_get_charp);
+
+static void param_free_charp(void *arg)
+{
+	maybe_kfree_parameter(*((char **)arg));
+}
+
+struct kernel_param_ops param_ops_charp = {
+	.set = param_set_charp,
+	.get = param_get_charp,
+	.free = param_free_charp,
+};
+EXPORT_SYMBOL(param_ops_charp);
 
 /* Actually could be a bool or an int, for historical reasons. */
-int param_set_bool(const char *val, struct kernel_param *kp)
+int param_set_bool(const char *val, const struct kernel_param *kp)
 {
 	bool v;
 
@@ -258,8 +319,9 @@ int param_set_bool(const char *val, struct kernel_param *kp)
 		*(int *)kp->arg = v;
 	return 0;
 }
+EXPORT_SYMBOL(param_set_bool);
 
-int param_get_bool(char *buffer, struct kernel_param *kp)
+int param_get_bool(char *buffer, const struct kernel_param *kp)
 {
 	bool val;
 	if (kp->flags & KPARAM_ISBOOL)
@@ -270,9 +332,16 @@ int param_get_bool(char *buffer, struct kernel_param *kp)
 	/* Y and N chosen as being relatively non-coder friendly */
 	return sprintf(buffer, "%c", val ? 'Y' : 'N');
 }
+EXPORT_SYMBOL(param_get_bool);
+
+struct kernel_param_ops param_ops_bool = {
+	.set = param_set_bool,
+	.get = param_get_bool,
+};
+EXPORT_SYMBOL(param_ops_bool);
 
 /* This one must be bool. */
-int param_set_invbool(const char *val, struct kernel_param *kp)
+int param_set_invbool(const char *val, const struct kernel_param *kp)
 {
 	int ret;
 	bool boolval;
@@ -285,18 +354,26 @@ int param_set_invbool(const char *val, struct kernel_param *kp)
 		*(bool *)kp->arg = !boolval;
 	return ret;
 }
+EXPORT_SYMBOL(param_set_invbool);
 
-int param_get_invbool(char *buffer, struct kernel_param *kp)
+int param_get_invbool(char *buffer, const struct kernel_param *kp)
 {
 	return sprintf(buffer, "%c", (*(bool *)kp->arg) ? 'N' : 'Y');
 }
+EXPORT_SYMBOL(param_get_invbool);
+
+struct kernel_param_ops param_ops_invbool = {
+	.set = param_set_invbool,
+	.get = param_get_invbool,
+};
+EXPORT_SYMBOL(param_ops_invbool);
 
 /* We break the rule and mangle the string. */
 static int param_array(const char *name,
 		       const char *val,
 		       unsigned int min, unsigned int max,
 		       void *elem, int elemsize,
-		       int (*set)(const char *, struct kernel_param *kp),
+		       int (*set)(const char *, const struct kernel_param *kp),
 		       u16 flags,
 		       unsigned int *num)
 {
@@ -309,12 +386,6 @@ static int param_array(const char *name,
 	kp.arg = elem;
 	kp.flags = flags;
 
-	/* No equals sign? */
-	if (!val) {
-		printk(KERN_ERR "%s: expects arguments\n", name);
-		return -EINVAL;
-	}
-
 	*num = 0;
 	/* We expect a comma-separated list of values. */
 	do {
@@ -330,6 +401,7 @@ static int param_array(const char *name,
 		/* nul-terminate and parse */
 		save = val[len];
 		((char *)val)[len] = '\0';
+		BUG_ON(!mutex_is_locked(&param_lock));
 		ret = set(val, &kp);
 
 		if (ret != 0)
@@ -347,17 +419,17 @@ static int param_array(const char *name,
 	return 0;
 }
 
-int param_array_set(const char *val, struct kernel_param *kp)
+static int param_array_set(const char *val, const struct kernel_param *kp)
 {
 	const struct kparam_array *arr = kp->arr;
 	unsigned int temp_num;
 
 	return param_array(kp->name, val, 1, arr->max, arr->elem,
-			   arr->elemsize, arr->set, kp->flags,
+			   arr->elemsize, arr->ops->set, kp->flags,
 			   arr->num ?: &temp_num);
 }
 
-int param_array_get(char *buffer, struct kernel_param *kp)
+static int param_array_get(char *buffer, const struct kernel_param *kp)
 {
 	int i, off, ret;
 	const struct kparam_array *arr = kp->arr;
@@ -368,7 +440,8 @@ int param_array_get(char *buffer, struct kernel_param *kp)
 		if (i)
 			buffer[off++] = ',';
 		p.arg = arr->elem + arr->elemsize * i;
-		ret = arr->get(buffer + off, &p);
+		BUG_ON(!mutex_is_locked(&param_lock));
+		ret = arr->ops->get(buffer + off, &p);
 		if (ret < 0)
 			return ret;
 		off += ret;
@@ -377,14 +450,27 @@ int param_array_get(char *buffer, struct kernel_param *kp)
 	return off;
 }
 
-int param_set_copystring(const char *val, struct kernel_param *kp)
+static void param_array_free(void *arg)
+{
+	unsigned int i;
+	const struct kparam_array *arr = arg;
+
+	if (arr->ops->free)
+		for (i = 0; i < (arr->num ? *arr->num : arr->max); i++)
+			arr->ops->free(arr->elem + arr->elemsize * i);
+}
+
+struct kernel_param_ops param_array_ops = {
+	.set = param_array_set,
+	.get = param_array_get,
+	.free = param_array_free,
+};
+EXPORT_SYMBOL(param_array_ops);
+
+int param_set_copystring(const char *val, const struct kernel_param *kp)
 {
 	const struct kparam_string *kps = kp->str;
 
-	if (!val) {
-		printk(KERN_ERR "%s: missing param set value\n", kp->name);
-		return -EINVAL;
-	}
 	if (strlen(val)+1 > kps->maxlen) {
 		printk(KERN_ERR "%s: string doesn't fit in %u chars.\n",
 		       kp->name, kps->maxlen-1);
@@ -393,12 +479,20 @@ int param_set_copystring(const char *val, struct kernel_param *kp)
 	strcpy(kps->string, val);
 	return 0;
 }
+EXPORT_SYMBOL(param_set_copystring);
 
-int param_get_string(char *buffer, struct kernel_param *kp)
+int param_get_string(char *buffer, const struct kernel_param *kp)
 {
 	const struct kparam_string *kps = kp->str;
 	return strlcpy(buffer, kps->string, kps->maxlen);
 }
+EXPORT_SYMBOL(param_get_string);
+
+struct kernel_param_ops param_ops_string = {
+	.set = param_set_copystring,
+	.get = param_get_string,
+};
+EXPORT_SYMBOL(param_ops_string);
 
 /* sysfs output in /sys/modules/XYZ/parameters/ */
 #define to_module_attr(n) container_of(n, struct module_attribute, attr)
@@ -409,7 +503,7 @@ extern struct kernel_param __start___param[], __stop___param[];
 struct param_attribute
 {
 	struct module_attribute mattr;
-	struct kernel_param *param;
+	const struct kernel_param *param;
 };
 
 struct module_param_attrs
@@ -428,10 +522,12 @@ static ssize_t param_attr_show(struct module_attribute *mattr,
 	int count;
 	struct param_attribute *attribute = to_param_attr(mattr);
 
-	if (!attribute->param->get)
+	if (!attribute->param->ops->get)
 		return -EPERM;
 
-	count = attribute->param->get(buf, attribute->param);
+	mutex_lock(&param_lock);
+	count = attribute->param->ops->get(buf, attribute->param);
+	mutex_unlock(&param_lock);
 	if (count > 0) {
 		strcat(buf, "\n");
 		++count;
@@ -447,10 +543,12 @@ static ssize_t param_attr_store(struct module_attribute *mattr,
  	int err;
 	struct param_attribute *attribute = to_param_attr(mattr);
 
-	if (!attribute->param->set)
+	if (!attribute->param->ops->set)
 		return -EPERM;
 
-	err = attribute->param->set(buf, attribute->param);
+	mutex_lock(&param_lock);
+	err = attribute->param->ops->set(buf, attribute->param);
+	mutex_unlock(&param_lock);
 	if (!err)
 		return len;
 	return err;
@@ -464,6 +562,18 @@ static ssize_t param_attr_store(struct module_attribute *mattr,
 #endif
 
 #ifdef CONFIG_SYSFS
+void __kernel_param_lock(void)
+{
+	mutex_lock(&param_lock);
+}
+EXPORT_SYMBOL(__kernel_param_lock);
+
+void __kernel_param_unlock(void)
+{
+	mutex_unlock(&param_lock);
+}
+EXPORT_SYMBOL(__kernel_param_unlock);
+
 /*
  * add_sysfs_param - add a parameter to sysfs
  * @mk: struct module_kobject
@@ -475,7 +585,7 @@ static ssize_t param_attr_store(struct module_attribute *mattr,
  * if there's an error.
  */
 static __modinit int add_sysfs_param(struct module_kobject *mk,
-				     struct kernel_param *kp,
+				     const struct kernel_param *kp,
 				     const char *name)
 {
 	struct module_param_attrs *new;
@@ -557,7 +667,7 @@ static void free_module_param_attrs(struct module_kobject *mk)
  * /sys/module/[mod->name]/parameters/
  */
 int module_param_sysfs_setup(struct module *mod,
-			     struct kernel_param *kparam,
+			     const struct kernel_param *kparam,
 			     unsigned int num_params)
 {
 	int i, err;
@@ -602,7 +712,11 @@ void module_param_sysfs_remove(struct module *mod)
 
 void destroy_params(const struct kernel_param *params, unsigned num)
 {
-	/* FIXME: This should free kmalloced charp parameters.  It doesn't. */
+	unsigned int i;
+
+	for (i = 0; i < num; i++)
+		if (params[i].ops->free)
+			params[i].ops->free(params[i].arg);
 }
 
 static void __init kernel_add_sysfs_param(const char *name,
@@ -768,28 +882,3 @@ static int __init param_sysfs_init(void)
 subsys_initcall(param_sysfs_init);
 
 #endif /* CONFIG_SYSFS */
-
-EXPORT_SYMBOL(param_set_byte);
-EXPORT_SYMBOL(param_get_byte);
-EXPORT_SYMBOL(param_set_short);
-EXPORT_SYMBOL(param_get_short);
-EXPORT_SYMBOL(param_set_ushort);
-EXPORT_SYMBOL(param_get_ushort);
-EXPORT_SYMBOL(param_set_int);
-EXPORT_SYMBOL(param_get_int);
-EXPORT_SYMBOL(param_set_uint);
-EXPORT_SYMBOL(param_get_uint);
-EXPORT_SYMBOL(param_set_long);
-EXPORT_SYMBOL(param_get_long);
-EXPORT_SYMBOL(param_set_ulong);
-EXPORT_SYMBOL(param_get_ulong);
-EXPORT_SYMBOL(param_set_charp);
-EXPORT_SYMBOL(param_get_charp);
-EXPORT_SYMBOL(param_set_bool);
-EXPORT_SYMBOL(param_get_bool);
-EXPORT_SYMBOL(param_set_invbool);
-EXPORT_SYMBOL(param_get_invbool);
-EXPORT_SYMBOL(param_array_set);
-EXPORT_SYMBOL(param_array_get);
-EXPORT_SYMBOL(param_set_copystring);
-EXPORT_SYMBOL(param_get_string);
diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c
index 7eb78ecc1618..dcfbe99ff81c 100644
--- a/net/9p/trans_virtio.c
+++ b/net/9p/trans_virtio.c
@@ -137,7 +137,7 @@ static void req_done(struct virtqueue *vq)
 
 	P9_DPRINTK(P9_DEBUG_TRANS, ": request done\n");
 
-	while ((rc = chan->vq->vq_ops->get_buf(chan->vq, &len)) != NULL) {
+	while ((rc = virtqueue_get_buf(chan->vq, &len)) != NULL) {
 		P9_DPRINTK(P9_DEBUG_TRANS, ": rc %p\n", rc);
 		P9_DPRINTK(P9_DEBUG_TRANS, ": lookup tag %d\n", rc->tag);
 		req = p9_tag_lookup(chan->client, rc->tag);
@@ -209,13 +209,13 @@ p9_virtio_request(struct p9_client *client, struct p9_req_t *req)
 
 	req->status = REQ_STATUS_SENT;
 
-	if (chan->vq->vq_ops->add_buf(chan->vq, chan->sg, out, in, req->tc) < 0) {
+	if (virtqueue_add_buf(chan->vq, chan->sg, out, in, req->tc) < 0) {
 		P9_DPRINTK(P9_DEBUG_TRANS,
 			"9p debug: virtio rpc add_buf returned failure");
 		return -EIO;
 	}
 
-	chan->vq->vq_ops->kick(chan->vq);
+	virtqueue_kick(chan->vq);
 
 	P9_DPRINTK(P9_DEBUG_TRANS, "9p debug: virtio request kicked\n");
 	return 0;
diff --git a/net/mac80211/rate.c b/net/mac80211/rate.c
index 6d0bd198af19..be04d46110fe 100644
--- a/net/mac80211/rate.c
+++ b/net/mac80211/rate.c
@@ -103,6 +103,7 @@ ieee80211_rate_control_ops_get(const char *name)
 	struct rate_control_ops *ops;
 	const char *alg_name;
 
+	kparam_block_sysfs_write(ieee80211_default_rc_algo);
 	if (!name)
 		alg_name = ieee80211_default_rc_algo;
 	else
@@ -120,6 +121,7 @@ ieee80211_rate_control_ops_get(const char *name)
 	/* try built-in one if specific alg requested but not found */
 	if (!ops && strlen(CONFIG_MAC80211_RC_DEFAULT))
 		ops = ieee80211_try_rate_control_ops_get(CONFIG_MAC80211_RC_DEFAULT);
+	kparam_unblock_sysfs_write(ieee80211_default_rc_algo);
 
 	return ops;
 }
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index beefa7a3a90e..756a836187e3 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -2568,7 +2568,8 @@ void cleanup_socket_xprt(void)
 	xprt_unregister_transport(&xs_bc_tcp_transport);
 }
 
-static int param_set_uint_minmax(const char *val, struct kernel_param *kp,
+static int param_set_uint_minmax(const char *val,
+		const struct kernel_param *kp,
 		unsigned int min, unsigned int max)
 {
 	unsigned long num;
@@ -2583,34 +2584,37 @@ static int param_set_uint_minmax(const char *val, struct kernel_param *kp,
 	return 0;
 }
 
-static int param_set_portnr(const char *val, struct kernel_param *kp)
+static int param_set_portnr(const char *val, const struct kernel_param *kp)
 {
 	return param_set_uint_minmax(val, kp,
 			RPC_MIN_RESVPORT,
 			RPC_MAX_RESVPORT);
 }
 
-static int param_get_portnr(char *buffer, struct kernel_param *kp)
-{
-	return param_get_uint(buffer, kp);
-}
+static struct kernel_param_ops param_ops_portnr = {
+	.set = param_set_portnr,
+	.get = param_get_uint,
+};
+
 #define param_check_portnr(name, p) \
 	__param_check(name, p, unsigned int);
 
 module_param_named(min_resvport, xprt_min_resvport, portnr, 0644);
 module_param_named(max_resvport, xprt_max_resvport, portnr, 0644);
 
-static int param_set_slot_table_size(const char *val, struct kernel_param *kp)
+static int param_set_slot_table_size(const char *val,
+				     const struct kernel_param *kp)
 {
 	return param_set_uint_minmax(val, kp,
 			RPC_MIN_SLOT_TABLE,
 			RPC_MAX_SLOT_TABLE);
 }
 
-static int param_get_slot_table_size(char *buffer, struct kernel_param *kp)
-{
-	return param_get_uint(buffer, kp);
-}
+static struct kernel_param_ops param_ops_slot_table_size = {
+	.set = param_set_slot_table_size,
+	.get = param_get_uint,
+};
+
 #define param_check_slot_table_size(name, p) \
 	__param_check(name, p, unsigned int);
 
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 36a60a853173..003ccd72601d 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -818,6 +818,19 @@ static int do_mdio_entry(const char *filename,
 	return 1;
 }
 
+/* looks like: "pnp:dD" */
+static int do_isapnp_entry(const char *filename,
+			   struct isapnp_device_id *id, char *alias)
+{
+	sprintf(alias, "pnp:d%c%c%c%x%x%x%x*",
+		'A' + ((id->vendor >> 2) & 0x3f) - 1,
+		'A' + (((id->vendor & 3) << 3) | ((id->vendor >> 13) & 7)) - 1,
+		'A' + ((id->vendor >> 8) & 0x1f) - 1,
+		(id->function >> 4) & 0x0f, id->function & 0x0f,
+		(id->function >> 12) & 0x0f, (id->function >> 8) & 0x0f);
+	return 1;
+}
+
 /* Ignore any prefix, eg. some architectures prepend _ */
 static inline int sym_is(const char *symbol, const char *name)
 {
@@ -969,6 +982,10 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
 		do_table(symval, sym->st_size,
 			 sizeof(struct mdio_device_id), "mdio",
 			 do_mdio_entry, mod);
+	else if (sym_is(symname, "__mod_isapnp_device_table"))
+		do_table(symval, sym->st_size,
+			sizeof(struct isapnp_device_id), "isa",
+			do_isapnp_entry, mod);
 	free(zeros);
 }
 
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 3318692e4e76..a5d1457cf239 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -981,6 +981,13 @@ static const struct sectioncheck *section_mismatch(
  *   fromsec = .data*
  *   atsym   =__param*
  *
+ * Pattern 1a:
+ *   module_param_call() ops can refer to __init set function if permissions=0
+ *   The pattern is identified by:
+ *   tosec   = .init.text
+ *   fromsec = .data*
+ *   atsym   = __param_ops_*
+ *
  * Pattern 2:
  *   Many drivers utilise a *driver container with references to
  *   add, remove, probe functions etc.
@@ -1015,6 +1022,12 @@ static int secref_whitelist(const struct sectioncheck *mismatch,
 	    (strncmp(fromsym, "__param", strlen("__param")) == 0))
 		return 0;
 
+	/* Check for pattern 1a */
+	if (strcmp(tosec, ".init.text") == 0 &&
+	    match(fromsec, data_sections) &&
+	    (strncmp(fromsym, "__param_ops_", strlen("__param_ops_")) == 0))
+		return 0;
+
 	/* Check for pattern 2 */
 	if (match(tosec, init_exit_sections) &&
 	    match(fromsec, data_sections) &&