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Diffstat (limited to 'include/asm-xtensa/semaphore.h')
-rw-r--r--include/asm-xtensa/semaphore.h49
1 files changed, 11 insertions, 38 deletions
diff --git a/include/asm-xtensa/semaphore.h b/include/asm-xtensa/semaphore.h
index db740b8bc6f..09e89ab3eb6 100644
--- a/include/asm-xtensa/semaphore.h
+++ b/include/asm-xtensa/semaphore.h
@@ -20,28 +20,19 @@ struct semaphore {
atomic_t count;
int sleepers;
wait_queue_head_t wait;
-#if WAITQUEUE_DEBUG
- long __magic;
-#endif
};
-#if 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 __SEMAPHORE_INITIALIZER(name,n) \
+{ \
+ .count = ATOMIC_INIT(n), \
+ .sleepers = 0, \
+ .wait = __WAIT_QUEUE_HEAD_INITIALIZER((name).wait) \
+}
-#define __MUTEX_INITIALIZER(name) \
+#define __MUTEX_INITIALIZER(name) \
__SEMAPHORE_INITIALIZER(name, 1)
-#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
+#define __DECLARE_SEMAPHORE_GENERIC(name,count) \
struct semaphore name = __SEMAPHORE_INITIALIZER(name,count)
#define DECLARE_MUTEX(name) __DECLARE_SEMAPHORE_GENERIC(name,1)
@@ -49,17 +40,8 @@ struct semaphore {
static inline void sema_init (struct semaphore *sem, int val)
{
-/*
- * *sem = (struct semaphore)__SEMAPHORE_INITIALIZER((*sem),val);
- *
- * i'd rather use the more flexible initialization above, but sadly
- * GCC 2.7.2.3 emits a bogus warning. EGCS doesnt. Oh well.
- */
atomic_set(&sem->count, val);
init_waitqueue_head(&sem->wait);
-#if WAITQUEUE_DEBUG
- sem->__magic = (int)&sem->__magic;
-#endif
}
static inline void init_MUTEX (struct semaphore *sem)
@@ -81,9 +63,7 @@ extern spinlock_t semaphore_wake_lock;
static inline void down(struct semaphore * sem)
{
-#if WAITQUEUE_DEBUG
- CHECK_MAGIC(sem->__magic);
-#endif
+ might_sleep();
if (atomic_sub_return(1, &sem->count) < 0)
__down(sem);
@@ -92,9 +72,8 @@ static inline void down(struct semaphore * sem)
static inline int down_interruptible(struct semaphore * sem)
{
int ret = 0;
-#if WAITQUEUE_DEBUG
- CHECK_MAGIC(sem->__magic);
-#endif
+
+ might_sleep();
if (atomic_sub_return(1, &sem->count) < 0)
ret = __down_interruptible(sem);
@@ -104,9 +83,6 @@ static inline int down_interruptible(struct semaphore * sem)
static inline int down_trylock(struct semaphore * sem)
{
int ret = 0;
-#if WAITQUEUE_DEBUG
- CHECK_MAGIC(sem->__magic);
-#endif
if (atomic_sub_return(1, &sem->count) < 0)
ret = __down_trylock(sem);
@@ -119,9 +95,6 @@ static inline int down_trylock(struct semaphore * sem)
*/
static inline void up(struct semaphore * sem)
{
-#if WAITQUEUE_DEBUG
- CHECK_MAGIC(sem->__magic);
-#endif
if (atomic_add_return(1, &sem->count) <= 0)
__up(sem);
}