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)
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)
*/
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
+ LOCK_PREFIX "decl %0\n\t" /* --sem->count */
+ "jns 1f\n\t"
+ "call __down_failed\n"
+ "1:"
:"=m" (sem->count)
:"D" (sem)
:"memory");
{
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)
+ "xorl %0,%0\n\t"
+ LOCK_PREFIX "decl %1\n\t" /* --sem->count */
+ "jns 2f\n\t"
+ "call __down_failed_interruptible\n"
+ "2:\n"
+ :"=&a" (result), "=m" (sem->count)
:"D" (sem)
:"memory");
return result;
{
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)
+ "xorl %0,%0\n\t"
+ LOCK_PREFIX "decl %1\n\t" /* --sem->count */
+ "jns 2f\n\t"
+ "call __down_failed_trylock\n\t"
+ "2:\n"
+ :"=&a" (result), "=m" (sem->count)
:"D" (sem)
:"memory","cc");
return result;
*/
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
+ LOCK_PREFIX "incl %0\n\t" /* ++sem->count */
+ "jg 1f\n\t"
+ "call __up_wakeup\n"
+ "1:"
:"=m" (sem->count)
:"D" (sem)
:"memory");