04fc8bbcf5
DECLARE_MUTEX_LOCKED was used for semaphores used as completions and we've got rid of them. Well, except for one in libusual that the maintainer explicitly wants to keep as semaphore. So convert that useage to an explicit sema_init and kill of DECLARE_MUTEX_LOCKED so that new code is reminded to use a completion. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: "Satyam Sharma" <satyam.sharma@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
#ifndef _SPARC64_SEMAPHORE_H
|
|
#define _SPARC64_SEMAPHORE_H
|
|
|
|
/* These are actually reasonable on the V9.
|
|
*
|
|
* See asm-ppc/semaphore.h for implementation commentary,
|
|
* only sparc64 specific issues are commented here.
|
|
*/
|
|
#ifdef __KERNEL__
|
|
|
|
#include <asm/atomic.h>
|
|
#include <asm/system.h>
|
|
#include <linux/wait.h>
|
|
#include <linux/rwsem.h>
|
|
|
|
struct semaphore {
|
|
atomic_t count;
|
|
wait_queue_head_t wait;
|
|
};
|
|
|
|
#define __SEMAPHORE_INITIALIZER(name, count) \
|
|
{ ATOMIC_INIT(count), \
|
|
__WAIT_QUEUE_HEAD_INITIALIZER((name).wait) }
|
|
|
|
#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)
|
|
{
|
|
atomic_set(&sem->count, val);
|
|
init_waitqueue_head(&sem->wait);
|
|
}
|
|
|
|
static inline void init_MUTEX (struct semaphore *sem)
|
|
{
|
|
sema_init(sem, 1);
|
|
}
|
|
|
|
static inline void init_MUTEX_LOCKED (struct semaphore *sem)
|
|
{
|
|
sema_init(sem, 0);
|
|
}
|
|
|
|
extern void up(struct semaphore *sem);
|
|
extern void down(struct semaphore *sem);
|
|
extern int down_trylock(struct semaphore *sem);
|
|
extern int down_interruptible(struct semaphore *sem);
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* !(_SPARC64_SEMAPHORE_H) */
|