Merge tag 's390-5.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 updates from Heiko Carstens:

 - Add support for the hugetlb_cma command line option to allocate
   gigantic hugepages using CMA

 - Add arch_get_random_long() support.

 - Add ap bus userspace notifications.

 - Increase default size of vmalloc area to 512GB and otherwise let it
   increase dynamically by the size of physical memory. This should fix
   all occurrences where the vmalloc area was not large enough.

 - Completely get rid of set_fs() (aka select SET_FS) and rework address
   space handling while doing that; making address space handling much
   more simple.

 - Reimplement getcpu vdso syscall in C.

 - Add support for extended SCLP responses (> 4k). This allows e.g. to
   handle also potential large system configurations.

 - Simplify KASAN by removing 3-level page table support and only
   supporting 4-levels from now on.

 - Improve debug-ability of the kernel decompressor code, which now
   prints also stack traces and symbols in case of problems to the
   console.

 - Remove more power management leftovers.

 - Other various fixes and improvements all over the place.

* tag 's390-5.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (62 commits)
  s390/mm: add support to allocate gigantic hugepages using CMA
  s390/crypto: add arch_get_random_long() support
  s390/smp: perform initial CPU reset also for SMT siblings
  s390/mm: use invalid asce for user space when switching to init_mm
  s390/idle: fix accounting with machine checks
  s390/idle: add missing mt_cycles calculation
  s390/boot: add build-id to decompressor
  s390/kexec_file: fix diag308 subcode when loading crash kernel
  s390/cio: fix use-after-free in ccw_device_destroy_console
  s390/cio: remove pm support from ccw bus driver
  s390/cio: remove pm support from css-bus driver
  s390/cio: remove pm support from IO subchannel drivers
  s390/cio: remove pm support from chsc subchannel driver
  s390/vmur: remove unused pm related functions
  s390/tape: remove unsupported PM functions
  s390/cio: remove pm support from eadm-sch drivers
  s390: remove pm support from console drivers
  s390/dasd: remove unused pm related functions
  s390/zfcp: remove pm support from zfcp driver
  s390/ap: let bus_register() add the AP bus sysfs attributes
  ...

4 files changed, 2 insertions, 198 deletions

diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 217a7b84abdf..fd568248fd26 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -75,7 +75,6 @@ static int dasd_flush_block_queue(struct dasd_block *);
 static void dasd_device_tasklet(unsigned long);
 static void dasd_block_tasklet(unsigned long);
 static void do_kick_device(struct work_struct *);
-static void do_restore_device(struct work_struct *);
 static void do_reload_device(struct work_struct *);
 static void do_requeue_requests(struct work_struct *);
 static void dasd_return_cqr_cb(struct dasd_ccw_req *, void *);
@@ -138,7 +137,6 @@ struct dasd_device *dasd_alloc_device(void)
 	INIT_LIST_HEAD(&device->ccw_queue);
 	timer_setup(&device->timer, dasd_device_timeout, 0);
 	INIT_WORK(&device->kick_work, do_kick_device);
-	INIT_WORK(&device->restore_device, do_restore_device);
 	INIT_WORK(&device->reload_device, do_reload_device);
 	INIT_WORK(&device->requeue_requests, do_requeue_requests);
 	device->state = DASD_STATE_NEW;
@@ -621,26 +619,6 @@ void dasd_reload_device(struct dasd_device *device)
 EXPORT_SYMBOL(dasd_reload_device);
 
 /*
- * dasd_restore_device will schedule a call do do_restore_device to the kernel
- * event daemon.
- */
-static void do_restore_device(struct work_struct *work)
-{
-	struct dasd_device *device = container_of(work, struct dasd_device,
-						  restore_device);
-	device->cdev->drv->restore(device->cdev);
-	dasd_put_device(device);
-}
-
-void dasd_restore_device(struct dasd_device *device)
-{
-	dasd_get_device(device);
-	/* queue call to dasd_restore_device to the kernel event daemon. */
-	if (!schedule_work(&device->restore_device))
-		dasd_put_device(device);
-}
-
-/*
  * Set the target state for a device and starts the state change.
  */
 void dasd_set_target_state(struct dasd_device *device, int target)
@@ -1514,7 +1492,6 @@ int dasd_start_IO(struct dasd_ccw_req *cqr)
 			      "start_IO: -EIO device gone, retry");
 		break;
 	case -EINVAL:
-		/* most likely caused in power management context */
 		DBF_DEV_EVENT(DBF_WARNING, device, "%s",
 			      "start_IO: -EINVAL device currently "
 			      "not accessible");
@@ -2048,7 +2025,7 @@ static void __dasd_device_check_expire(struct dasd_device *device)
 static int __dasd_device_is_unusable(struct dasd_device *device,
 				     struct dasd_ccw_req *cqr)
 {
-	int mask = ~(DASD_STOPPED_DC_WAIT | DASD_UNRESUMED_PM | DASD_STOPPED_NOSPC);
+	int mask = ~(DASD_STOPPED_DC_WAIT | DASD_STOPPED_NOSPC);
 
 	if (test_bit(DASD_FLAG_OFFLINE, &device->flags) &&
 	    !test_bit(DASD_FLAG_SAFE_OFFLINE_RUNNING, &device->flags)) {
@@ -2112,8 +2089,7 @@ static void __dasd_device_check_path_events(struct dasd_device *device)
 	if (!dasd_path_get_tbvpm(device))
 		return;
 
-	if (device->stopped &
-	    ~(DASD_STOPPED_DC_WAIT | DASD_UNRESUMED_PM))
+	if (device->stopped & ~(DASD_STOPPED_DC_WAIT))
 		return;
 	rc = device->discipline->verify_path(device,
 					     dasd_path_get_tbvpm(device));
@@ -3794,11 +3770,6 @@ int dasd_generic_path_operational(struct dasd_device *device)
 		 "operational\n");
 	DBF_DEV_EVENT(DBF_WARNING, device, "%s", "path operational");
 	dasd_device_remove_stop_bits(device, DASD_STOPPED_DC_WAIT);
-	if (device->stopped & DASD_UNRESUMED_PM) {
-		dasd_device_remove_stop_bits(device, DASD_UNRESUMED_PM);
-		dasd_restore_device(device);
-		return 1;
-	}
 	dasd_schedule_device_bh(device);
 	if (device->block) {
 		dasd_schedule_block_bh(device->block);
@@ -4058,66 +4029,6 @@ void dasd_schedule_requeue(struct dasd_device *device)
 }
 EXPORT_SYMBOL(dasd_schedule_requeue);
 
-int dasd_generic_pm_freeze(struct ccw_device *cdev)
-{
-	struct dasd_device *device = dasd_device_from_cdev(cdev);
-
-	if (IS_ERR(device))
-		return PTR_ERR(device);
-
-	/* mark device as suspended */
-	set_bit(DASD_FLAG_SUSPENDED, &device->flags);
-
-	if (device->discipline->freeze)
-		device->discipline->freeze(device);
-
-	/* disallow new I/O  */
-	dasd_device_set_stop_bits(device, DASD_STOPPED_PM);
-
-	return dasd_generic_requeue_all_requests(device);
-}
-EXPORT_SYMBOL_GPL(dasd_generic_pm_freeze);
-
-int dasd_generic_restore_device(struct ccw_device *cdev)
-{
-	struct dasd_device *device = dasd_device_from_cdev(cdev);
-	int rc = 0;
-
-	if (IS_ERR(device))
-		return PTR_ERR(device);
-
-	/* allow new IO again */
-	dasd_device_remove_stop_bits(device,
-				     (DASD_STOPPED_PM | DASD_UNRESUMED_PM));
-
-	dasd_schedule_device_bh(device);
-
-	/*
-	 * call discipline restore function
-	 * if device is stopped do nothing e.g. for disconnected devices
-	 */
-	if (device->discipline->restore && !(device->stopped))
-		rc = device->discipline->restore(device);
-	if (rc || device->stopped)
-		/*
-		 * if the resume failed for the DASD we put it in
-		 * an UNRESUMED stop state
-		 */
-		device->stopped |= DASD_UNRESUMED_PM;
-
-	if (device->block) {
-		dasd_schedule_block_bh(device->block);
-		if (device->block->request_queue)
-			blk_mq_run_hw_queues(device->block->request_queue,
-					     true);
-	}
-
-	clear_bit(DASD_FLAG_SUSPENDED, &device->flags);
-	dasd_put_device(device);
-	return 0;
-}
-EXPORT_SYMBOL_GPL(dasd_generic_restore_device);
-
 static struct dasd_ccw_req *dasd_generic_build_rdc(struct dasd_device *device,
 						   int rdc_buffer_size,
 						   int magic)
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index ad44d22e8859..758ee4153ac1 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -5716,95 +5716,6 @@ static void dasd_eckd_dump_sense(struct dasd_device *device,
 	}
 }
 
-static int dasd_eckd_pm_freeze(struct dasd_device *device)
-{
-	/*
-	 * the device should be disconnected from our LCU structure
-	 * on restore we will reconnect it and reread LCU specific
-	 * information like PAV support that might have changed
-	 */
-	dasd_alias_remove_device(device);
-	dasd_alias_disconnect_device_from_lcu(device);
-
-	return 0;
-}
-
-static int dasd_eckd_restore_device(struct dasd_device *device)
-{
-	struct dasd_eckd_private *private = device->private;
-	struct dasd_eckd_characteristics temp_rdc_data;
-	int rc;
-	struct dasd_uid temp_uid;
-	unsigned long flags;
-	unsigned long cqr_flags = 0;
-
-	/* Read Configuration Data */
-	rc = dasd_eckd_read_conf(device);
-	if (rc) {
-		DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
-				"Read configuration data failed, rc=%d", rc);
-		goto out_err;
-	}
-
-	dasd_eckd_get_uid(device, &temp_uid);
-	/* Generate device unique id */
-	rc = dasd_eckd_generate_uid(device);
-	spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
-	if (memcmp(&private->uid, &temp_uid, sizeof(struct dasd_uid)) != 0)
-		dev_err(&device->cdev->dev, "The UID of the DASD has "
-			"changed\n");
-	spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
-	if (rc)
-		goto out_err;
-
-	/* register lcu with alias handling, enable PAV if this is a new lcu */
-	rc = dasd_alias_make_device_known_to_lcu(device);
-	if (rc)
-		goto out_err;
-
-	set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr_flags);
-	dasd_eckd_validate_server(device, cqr_flags);
-
-	/* RE-Read Configuration Data */
-	rc = dasd_eckd_read_conf(device);
-	if (rc) {
-		DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
-			"Read configuration data failed, rc=%d", rc);
-		goto out_err2;
-	}
-
-	/* Read Feature Codes */
-	dasd_eckd_read_features(device);
-
-	/* Read Volume Information */
-	dasd_eckd_read_vol_info(device);
-
-	/* Read Extent Pool Information */
-	dasd_eckd_read_ext_pool_info(device);
-
-	/* Read Device Characteristics */
-	rc = dasd_generic_read_dev_chars(device, DASD_ECKD_MAGIC,
-					 &temp_rdc_data, 64);
-	if (rc) {
-		DBF_EVENT_DEVID(DBF_WARNING, device->cdev,
-				"Read device characteristic failed, rc=%d", rc);
-		goto out_err2;
-	}
-	spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
-	memcpy(&private->rdc_data, &temp_rdc_data, sizeof(temp_rdc_data));
-	spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
-
-	/* add device to alias management */
-	dasd_alias_add_device(device);
-
-	return 0;
-
-out_err2:
-	dasd_alias_disconnect_device_from_lcu(device);
-out_err:
-	return -1;
-}
-
 static int dasd_eckd_reload_device(struct dasd_device *device)
 {
 	struct dasd_eckd_private *private = device->private;
@@ -6668,9 +6579,6 @@ static struct ccw_driver dasd_eckd_driver = {
 	.notify      = dasd_generic_notify,
 	.path_event  = dasd_generic_path_event,
 	.shutdown    = dasd_generic_shutdown,
-	.freeze      = dasd_generic_pm_freeze,
-	.thaw	     = dasd_generic_restore_device,
-	.restore     = dasd_generic_restore_device,
 	.uc_handler  = dasd_generic_uc_handler,
 	.int_class   = IRQIO_DAS,
 };
@@ -6702,8 +6610,6 @@ static struct dasd_discipline dasd_eckd_discipline = {
 	.dump_sense_dbf = dasd_eckd_dump_sense_dbf,
 	.fill_info = dasd_eckd_fill_info,
 	.ioctl = dasd_eckd_ioctl,
-	.freeze = dasd_eckd_pm_freeze,
-	.restore = dasd_eckd_restore_device,
 	.reload = dasd_eckd_reload_device,
 	.get_uid = dasd_eckd_get_uid,
 	.kick_validate = dasd_eckd_kick_validate_server,
diff --git a/drivers/s390/block/dasd_fba.c b/drivers/s390/block/dasd_fba.c
index 1a44e321b54e..c027344ee225 100644
--- a/drivers/s390/block/dasd_fba.c
+++ b/drivers/s390/block/dasd_fba.c
@@ -79,9 +79,6 @@ static struct ccw_driver dasd_fba_driver = {
 	.set_online  = dasd_fba_set_online,
 	.notify      = dasd_generic_notify,
 	.path_event  = dasd_generic_path_event,
-	.freeze      = dasd_generic_pm_freeze,
-	.thaw	     = dasd_generic_restore_device,
-	.restore     = dasd_generic_restore_device,
 	.int_class   = IRQIO_DAS,
 };
 
diff --git a/drivers/s390/block/dasd_int.h b/drivers/s390/block/dasd_int.h
index fa552f9f1666..7a34161ea5c6 100644
--- a/drivers/s390/block/dasd_int.h
+++ b/drivers/s390/block/dasd_int.h
@@ -355,10 +355,6 @@ struct dasd_discipline {
 	int (*fill_info) (struct dasd_device *, struct dasd_information2_t *);
 	int (*ioctl) (struct dasd_block *, unsigned int, void __user *);
 
-	/* suspend/resume functions */
-	int (*freeze) (struct dasd_device *);
-	int (*restore) (struct dasd_device *);
-
 	/* reload device after state change */
 	int (*reload) (struct dasd_device *);
 
@@ -520,7 +516,6 @@ struct dasd_device {
 	atomic_t tasklet_scheduled;
         struct tasklet_struct tasklet;
 	struct work_struct kick_work;
-	struct work_struct restore_device;
 	struct work_struct reload_device;
 	struct work_struct kick_validate;
 	struct work_struct suc_work;
@@ -592,8 +587,6 @@ struct dasd_queue {
 #define DASD_STOPPED_PENDING 4         /* long busy */
 #define DASD_STOPPED_DC_WAIT 8         /* disconnected, wait */
 #define DASD_STOPPED_SU      16        /* summary unit check handling */
-#define DASD_STOPPED_PM      32        /* pm state transition */
-#define DASD_UNRESUMED_PM    64        /* pm resume failed state */
 #define DASD_STOPPED_NOSPC   128       /* no space left */
 
 /* per device flags */
@@ -753,7 +746,6 @@ enum blk_eh_timer_return dasd_times_out(struct request *req, bool reserved);
 void dasd_enable_device(struct dasd_device *);
 void dasd_set_target_state(struct dasd_device *, int);
 void dasd_kick_device(struct dasd_device *);
-void dasd_restore_device(struct dasd_device *);
 void dasd_reload_device(struct dasd_device *);
 void dasd_schedule_requeue(struct dasd_device *);
 
@@ -785,8 +777,6 @@ int dasd_generic_path_operational(struct dasd_device *);
 void dasd_generic_shutdown(struct ccw_device *);
 
 void dasd_generic_handle_state_change(struct dasd_device *);
-int dasd_generic_pm_freeze(struct ccw_device *);
-int dasd_generic_restore_device(struct ccw_device *);
 enum uc_todo dasd_generic_uc_handler(struct ccw_device *, struct irb *);
 void dasd_generic_path_event(struct ccw_device *, int *);
 int dasd_generic_verify_path(struct dasd_device *, __u8);