16 files changed, 92 insertions, 18 deletions
diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index 0be8d65bc3c8..f212fa98283e 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -23,7 +23,6 @@
 #include <linux/node.h>
 #include <linux/compiler.h>
 #include <linux/cpumask.h>
-#include <asm/semaphore.h>
 #include <linux/mutex.h>
 
 struct cpu {
diff --git a/include/linux/device.h b/include/linux/device.h
index d57661129cb2..769f1a308fd9 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -20,7 +20,7 @@
 #include <linux/types.h>
 #include <linux/module.h>
 #include <linux/pm.h>
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
 #include <asm/atomic.h>
 #include <asm/device.h>
 
diff --git a/include/linux/fs.h b/include/linux/fs.h
index b84b848431f2..91e8dec9e42b 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -287,9 +287,9 @@ extern int dir_notify_enable;
 #include <linux/pid.h>
 #include <linux/mutex.h>
 #include <linux/capability.h>
+#include <linux/semaphore.h>
 
 #include <asm/atomic.h>
-#include <asm/semaphore.h>
 #include <asm/byteorder.h>
 
 struct export_operations;
diff --git a/include/linux/hil_mlc.h b/include/linux/hil_mlc.h
index 8df29ca48a13..394a8405dd74 100644
--- a/include/linux/hil_mlc.h
+++ b/include/linux/hil_mlc.h
@@ -34,7 +34,7 @@
 #include <linux/hil.h>
 #include <linux/time.h>
 #include <linux/interrupt.h>
-#include <asm/semaphore.h>
+#include <linux/semaphore.h>
 #include <linux/serio.h>
 #include <linux/list.h>
 
diff --git a/include/linux/i2o.h b/include/linux/i2o.h
index 7da5b98d90e6..e92170dda245 100644
--- a/include/linux/i2o.h
+++ b/include/linux/i2o.h
@@ -33,9 +33,9 @@
 #include <linux/mempool.h>
 #include <linux/mutex.h>
 #include <linux/scatterlist.h>
+#include <linux/semaphore.h>	/* Needed for MUTEX init macros */
 
 #include <asm/io.h>
-#include <asm/semaphore.h>	/* Needed for MUTEX init macros */
 
 /* message queue empty */
 #define I2O_QUEUE_EMPTY		0xffffffff
diff --git a/include/linux/ide.h b/include/linux/ide.h
index cbbad809ef6b..36e70a0a5ecb 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -23,7 +23,6 @@
 #include <asm/byteorder.h>
 #include <asm/system.h>
 #include <asm/io.h>
-#include <asm/semaphore.h>
 #include <asm/mutex.h>
 
 #if defined(CRIS) || defined(FRV)
diff --git a/include/linux/if_pppox.h b/include/linux/if_pppox.h
index 40743e032845..6fb7f1788570 100644
--- a/include/linux/if_pppox.h
+++ b/include/linux/if_pppox.h
@@ -24,7 +24,6 @@
 #include <linux/if_ether.h>
 #include <linux/if.h>
 #include <linux/netdevice.h>
-#include <asm/semaphore.h>
 #include <linux/ppp_channel.h>
 #endif /* __KERNEL__ */
 #include <linux/if_pppol2tp.h>
diff --git a/include/linux/jbd.h b/include/linux/jbd.h
index b18fd3b9b835..ec52d0b32a26 100644
--- a/include/linux/jbd.h
+++ b/include/linux/jbd.h
@@ -32,8 +32,6 @@
 #include <linux/timer.h>
 #include <linux/lockdep.h>
 
-#include <asm/semaphore.h>
-
 #define journal_oom_retry 1
 
 /*
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index 2cbf6fdb1799..05e2b307161a 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -30,8 +30,6 @@
 #include <linux/bit_spinlock.h>
 #include <linux/mutex.h>
 #include <linux/timer.h>
-
-#include <asm/semaphore.h>
 #endif
 
 #define journal_oom_retry 1
diff --git a/include/linux/kernelcapi.h b/include/linux/kernelcapi.h
index 8c4350a9ed87..a53e932f80fb 100644
--- a/include/linux/kernelcapi.h
+++ b/include/linux/kernelcapi.h
@@ -48,7 +48,6 @@ typedef struct kcapi_carddef {
 #include <linux/list.h>
 #include <linux/skbuff.h>
 #include <linux/workqueue.h>
-#include <asm/semaphore.h>
 
 #define	KCI_CONTRUP	0	/* arg: struct capi_profile */
 #define	KCI_CONTRDOWN	1	/* arg: NULL */
diff --git a/include/linux/parport.h b/include/linux/parport.h
index d1ad546c8c9e..dcb9e01a69ca 100644
--- a/include/linux/parport.h
+++ b/include/linux/parport.h
@@ -101,9 +101,9 @@ typedef enum {
 #include <linux/spinlock.h>
 #include <linux/wait.h>
 #include <linux/irqreturn.h>
+#include <linux/semaphore.h>
 #include <asm/system.h>
 #include <asm/ptrace.h>
-#include <asm/semaphore.h>
 
 /* Define this later. */
 struct parport;
diff --git a/include/linux/quota.h b/include/linux/quota.h
index 6e0393a5b2ea..eb560d031acd 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -160,14 +160,18 @@ enum {
 
 
 #ifdef __KERNEL__
-#include <linux/spinlock.h>
-#include <linux/rwsem.h>
+#include <linux/list.h>
 #include <linux/mutex.h>
+#include <linux/rwsem.h>
+#include <linux/spinlock.h>
+#include <linux/wait.h>
 
 #include <linux/dqblk_xfs.h>
 #include <linux/dqblk_v1.h>
 #include <linux/dqblk_v2.h>
 
+#include <asm/atomic.h>
+
 extern spinlock_t dq_data_lock;
 
 /* Maximal numbers of writes for quota operation (insert/delete/update)
diff --git a/include/linux/raid/md.h b/include/linux/raid/md.h
index fbaeda79b2e9..8ab630b67fcc 100644
--- a/include/linux/raid/md.h
+++ b/include/linux/raid/md.h
@@ -19,7 +19,6 @@
 #define _MD_H
 
 #include <linux/blkdev.h>
-#include <asm/semaphore.h>
 #include <linux/major.h>
 #include <linux/ioctl.h>
 #include <linux/types.h>
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 9ae4030067a9..757db215f07d 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -61,7 +61,6 @@ struct sched_param {
 #include <linux/mm_types.h>
 
 #include <asm/system.h>
-#include <asm/semaphore.h>
 #include <asm/page.h>
 #include <asm/ptrace.h>
 #include <asm/cputime.h>
diff --git a/include/linux/semaphore.h b/include/linux/semaphore.h
new file mode 100644
index 000000000000..4b12d017e19f
--- /dev/null
+++ b/include/linux/semaphore.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2008 Intel Corporation
+ * Author: Matthew Wilcox <willy@linux.intel.com>
+ *
+ * Distributed under the terms of the GNU GPL, version 2
+ *
+ * Counting semaphores allow up to <n> tasks to acquire the semaphore
+ * simultaneously.
+ */
+#ifndef __LINUX_SEMAPHORE_H
+#define __LINUX_SEMAPHORE_H
+
+#include <linux/list.h>
+#include <linux/spinlock.h>
+
+/*
+ * The spinlock controls access to the other members of the semaphore.
+ * 'count' is decremented by every task which calls down*() and incremented
+ * by every call to up().  Thus, if it is positive, it indicates how many
+ * more tasks may acquire the lock.  If it is negative, it indicates how
+ * many tasks are waiting for the lock.  Tasks waiting for the lock are
+ * kept on the wait_list.
+ */
+struct semaphore {
+	spinlock_t		lock;
+	int			count;
+	struct list_head	wait_list;
+};
+
+#define __SEMAPHORE_INITIALIZER(name, n)				\
+{									\
+	.lock		= __SPIN_LOCK_UNLOCKED((name).lock),		\
+	.count		= n,						\
+	.wait_list	= LIST_HEAD_INIT((name).wait_list),		\
+}
+
+#define __DECLARE_SEMAPHORE_GENERIC(name, count) \
+	struct semaphore name = __SEMAPHORE_INITIALIZER(name, count)
+
+#define DECLARE_MUTEX(name)	__DECLARE_SEMAPHORE_GENERIC(name, 1)
+
+static inline void sema_init(struct semaphore *sem, int val)
+{
+	*sem = (struct semaphore) __SEMAPHORE_INITIALIZER(*sem, val);
+}
+
+#define init_MUTEX(sem)		sema_init(sem, 1)
+#define init_MUTEX_LOCKED(sem)	sema_init(sem, 0)
+
+/*
+ * Attempt to acquire the semaphore.  If another task is already holding the
+ * semaphore, sleep until the semaphore is released.
+ */
+extern void down(struct semaphore *sem);
+
+/*
+ * As down(), except the sleep may be interrupted by a signal.  If it is,
+ * this function will return -EINTR.
+ */
+extern int __must_check down_interruptible(struct semaphore *sem);
+
+/*
+ * As down_interruptible(), except the sleep may only be interrupted by
+ * signals which are fatal to this process.
+ */
+extern int __must_check down_killable(struct semaphore *sem);
+
+/*
+ * As down, except this function will not sleep.  It will return 0 if it
+ * acquired the semaphore and 1 if the semaphore was contended.  This
+ * function may be called from any context, including interrupt and softirq.
+ */
+extern int __must_check down_trylock(struct semaphore *sem);
+
+/*
+ * Release the semaphore.  Unlike mutexes, up() may be called from any
+ * context and even by tasks which have never called down().
+ */
+extern void up(struct semaphore *sem);
+
+#endif /* __LINUX_SEMAPHORE_H */
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 4c2577bd1c85..8df6d1382ac8 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -60,7 +60,6 @@ struct getcpu_cache;
 #include <linux/capability.h>
 #include <linux/list.h>
 #include <linux/sem.h>
-#include <asm/semaphore.h>
 #include <asm/siginfo.h>
 #include <asm/signal.h>
 #include <linux/quota.h>