*/
atomic_t count;
wait_queue_head_t wait;
-#ifdef WAITQUEUE_DEBUG
- long __magic;
-#endif
};
-#ifdef WAITQUEUE_DEBUG
-# define __SEM_DEBUG_INIT(name) \
- , (long)&(name).__magic
-#else
-# define __SEM_DEBUG_INIT(name)
-#endif
-
-#define __SEMAPHORE_INITIALIZER(name, count) \
- { ATOMIC_INIT(count), \
- __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
- __SEM_DEBUG_INIT(name) }
+#define __SEMAPHORE_INITIALIZER(name, n) \
+{ \
+ .count = ATOMIC_INIT(n), \
+ .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
+}
#define __MUTEX_INITIALIZER(name) \
__SEMAPHORE_INITIALIZER(name, 1)
{
atomic_set(&sem->count, val);
init_waitqueue_head(&sem->wait);
-#ifdef WAITQUEUE_DEBUG
- sem->__magic = (long)&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();
/*
{
int ret = 0;
-#ifdef WAITQUEUE_DEBUG
- CHECK_MAGIC(sem->__magic);
-#endif
might_sleep();
if (unlikely(atomic_dec_return(&sem->count) < 0))
static inline int down_trylock(struct semaphore * sem)
{
-#ifdef WAITQUEUE_DEBUG
- CHECK_MAGIC(sem->__magic);
-#endif
-
return atomic_dec_if_positive(&sem->count) < 0;
}
static inline void up(struct semaphore * sem)
{
-#ifdef WAITQUEUE_DEBUG
- CHECK_MAGIC(sem->__magic);
-#endif
-
if (unlikely(atomic_inc_return(&sem->count) <= 0))
__up(sem);
}