X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-i386%2Fsemaphore.h;h=4e34a468c3835cc323eea52518f5c916cea79691;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=986da200e5c81eb767936299c82c79de5dc8fe2c;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git

diff --git a/include/asm-i386/semaphore.h b/include/asm-i386/semaphore.h
index 986da200e..4e34a468c 100644
--- a/include/asm-i386/semaphore.h
+++ b/include/asm-i386/semaphore.h
@@ -45,24 +45,15 @@ struct semaphore {
 	atomic_t count;
 	int sleepers;
 	wait_queue_head_t wait;
-#ifdef WAITQUEUE_DEBUG
-	long __magic;
-#endif
 };
 
-#ifdef WAITQUEUE_DEBUG
-# define __SEM_DEBUG_INIT(name) \
-		, (int)&(name).__magic
-#else
-# define __SEM_DEBUG_INIT(name)
-#endif
-
-#define __SEMAPHORE_INITIALIZER(name,count) \
-{ ATOMIC_INIT(count), 0, __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
-	__SEM_DEBUG_INIT(name) }
 
-#define __MUTEX_INITIALIZER(name) \
-	__SEMAPHORE_INITIALIZER(name,1)
+#define __SEMAPHORE_INITIALIZER(name, n)				\
+{									\
+	.count		= ATOMIC_INIT(n),				\
+	.sleepers	= 0,						\
+	.wait		= __WAIT_QUEUE_HEAD_INITIALIZER((name).wait)	\
+}
 
 #define __DECLARE_SEMAPHORE_GENERIC(name,count) \
 	struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
@@ -81,9 +72,6 @@ static inline void sema_init (struct semaphore *sem, int val)
 	atomic_set(&sem->count, val);
 	sem->sleepers = 0;
 	init_waitqueue_head(&sem->wait);
-#ifdef WAITQUEUE_DEBUG
-	sem->__magic = (int)&sem->__magic;
-#endif
 }
 
 static inline void init_MUTEX (struct semaphore *sem)
@@ -96,15 +84,10 @@ static inline void init_MUTEX_LOCKED (struct semaphore *sem)
 	sema_init(sem, 0);
 }
 
-asmlinkage void __down_failed(void /* special register calling convention */);
-asmlinkage int  __down_failed_interruptible(void  /* params in registers */);
-asmlinkage int  __down_failed_trylock(void  /* params in registers */);
-asmlinkage void __up_wakeup(void /* special register calling convention */);
-
-asmlinkage void __down(struct semaphore * sem);
-asmlinkage int  __down_interruptible(struct semaphore * sem);
-asmlinkage int  __down_trylock(struct semaphore * sem);
-asmlinkage void __up(struct semaphore * sem);
+fastcall void __down_failed(void /* special register calling convention */);
+fastcall int  __down_failed_interruptible(void  /* params in registers */);
+fastcall int  __down_failed_trylock(void  /* params in registers */);
+fastcall void __up_wakeup(void /* special register calling convention */);
 
 /*
  * This is ugly, but we want the default case to fall through.
@@ -113,22 +96,17 @@ asmlinkage void __up(struct semaphore * sem);
  */
 static inline void down(struct semaphore * sem)
 {
-#ifdef WAITQUEUE_DEBUG
-	CHECK_MAGIC(sem->__magic);
-#endif
 	might_sleep();
 	__asm__ __volatile__(
 		"# atomic down operation\n\t"
-		LOCK "decl %0\n\t"     /* --sem->count */
-		"js 2f\n"
-		"1:\n"
-		LOCK_SECTION_START("")
-		"2:\tcall __down_failed\n\t"
-		"jmp 1b\n"
-		LOCK_SECTION_END
-		:"=m" (sem->count)
-		:"c" (sem)
-		:"memory");
+		LOCK_PREFIX "decl %0\n\t"     /* --sem->count */
+		"jns 2f\n"
+		"\tlea %0,%%eax\n\t"
+		"call __down_failed\n"
+		"2:"
+		:"+m" (sem->count)
+		:
+		:"memory","ax");
 }
 
 /*
@@ -139,22 +117,17 @@ static inline int down_interruptible(struct semaphore * sem)
 {
 	int result;
 
-#ifdef WAITQUEUE_DEBUG
-	CHECK_MAGIC(sem->__magic);
-#endif
 	might_sleep();
 	__asm__ __volatile__(
 		"# atomic interruptible down operation\n\t"
-		LOCK "decl %1\n\t"     /* --sem->count */
-		"js 2f\n\t"
-		"xorl %0,%0\n"
-		"1:\n"
-		LOCK_SECTION_START("")
-		"2:\tcall __down_failed_interruptible\n\t"
-		"jmp 1b\n"
-		LOCK_SECTION_END
-		:"=a" (result), "=m" (sem->count)
-		:"c" (sem)
+		"xorl %0,%0\n\t"
+		LOCK_PREFIX "decl %1\n\t"     /* --sem->count */
+		"jns 2f\n\t"
+		"lea %1,%%eax\n\t"
+		"call __down_failed_interruptible\n"
+		"2:"
+		:"=&a" (result), "+m" (sem->count)
+		:
 		:"memory");
 	return result;
 }
@@ -167,22 +140,16 @@ static inline int down_trylock(struct semaphore * sem)
 {
 	int result;
 
-#ifdef WAITQUEUE_DEBUG
-	CHECK_MAGIC(sem->__magic);
-#endif
-
 	__asm__ __volatile__(
 		"# atomic interruptible down operation\n\t"
-		LOCK "decl %1\n\t"     /* --sem->count */
-		"js 2f\n\t"
-		"xorl %0,%0\n"
-		"1:\n"
-		LOCK_SECTION_START("")
-		"2:\tcall __down_failed_trylock\n\t"
-		"jmp 1b\n"
-		LOCK_SECTION_END
-		:"=a" (result), "=m" (sem->count)
-		:"c" (sem)
+		"xorl %0,%0\n\t"
+		LOCK_PREFIX "decl %1\n\t"     /* --sem->count */
+		"jns 2f\n\t"
+		"lea %1,%%eax\n\t"
+		"call __down_failed_trylock\n\t"
+		"2:\n"
+		:"=&a" (result), "+m" (sem->count)
+		:
 		:"memory");
 	return result;
 }
@@ -190,27 +157,19 @@ static inline int down_trylock(struct semaphore * sem)
 /*
  * Note! This is subtle. We jump to wake people up only if
  * the semaphore was negative (== somebody was waiting on it).
- * The default case (no contention) will result in NO
- * jumps for both down() and up().
  */
 static inline void up(struct semaphore * sem)
 {
-#ifdef WAITQUEUE_DEBUG
-	CHECK_MAGIC(sem->__magic);
-#endif
 	__asm__ __volatile__(
 		"# atomic up operation\n\t"
-		LOCK "incl %0\n\t"     /* ++sem->count */
-		"jle 2f\n"
-		"1:\n"
-		LOCK_SECTION_START("")
-		"2:\tcall __up_wakeup\n\t"
-		"jmp 1b\n"
-		LOCK_SECTION_END
-		".subsection 0\n"
-		:"=m" (sem->count)
-		:"c" (sem)
-		:"memory");
+		LOCK_PREFIX "incl %0\n\t"     /* ++sem->count */
+		"jg 1f\n\t"
+		"lea %0,%%eax\n\t"
+		"call __up_wakeup\n"
+		"1:"
+		:"+m" (sem->count)
+		:
+		:"memory","ax");
 }
 
 #endif