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[PATCH] Pass a lock expression to __cond_lock, like __acquire and __release 

Currently, __acquire and __release take a lock expression, but __cond_lock
takes only a condition, not the lock acquired if the expression evaluates
to true.  Change __cond_lock to accept a lock expression, and change all
the callers to pass in a lock expression.

Signed-off-by: Josh Triplett <josh@freedesktop.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Josh Triplett 2006-09-29 02:01:03 -07:00 committed by Linus Torvalds
parent 7d2c502f14
commit dcc8e559ee
2 changed files with 7 additions and 7 deletions
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4
include/linux/compiler.h
View File

@ -14,7 +14,7 @@
# define __releases(x) __attribute__((context(1,0)))
# define __acquire(x) __context__(1)
# define __release(x) __context__(-1)
# define __cond_lock(x) ((x) ? ({ __context__(1); 1; }) : 0)
# define __cond_lock(x,c) ((c) ? ({ __acquire(x); 1; }) : 0)
extern void __chk_user_ptr(void __user *);
extern void __chk_io_ptr(void __iomem *);
#else
@ -31,7 +31,7 @@ extern void __chk_io_ptr(void __iomem *);
# define __releases(x)
# define __acquire(x) (void)0
# define __release(x) (void)0
# define __cond_lock(x) (x)
# define __cond_lock(x,c) (c)
#endif
#ifdef __KERNEL__

10
include/linux/spinlock.h
View File

@ -167,9 +167,9 @@ do { \
* regardless of whether CONFIG_SMP or CONFIG_PREEMPT are set. The various
* methods are defined as nops in the case they are not required.
*/
#define spin_trylock(lock) __cond_lock(_spin_trylock(lock))
#define read_trylock(lock) __cond_lock(_read_trylock(lock))
#define write_trylock(lock) __cond_lock(_write_trylock(lock))
#define spin_trylock(lock) __cond_lock(lock, _spin_trylock(lock))
#define read_trylock(lock) __cond_lock(lock, _read_trylock(lock))
#define write_trylock(lock) __cond_lock(lock, _write_trylock(lock))
#define spin_lock(lock) _spin_lock(lock)
@ -236,7 +236,7 @@ do { \
_write_unlock_irqrestore(lock, flags)
#define write_unlock_bh(lock) _write_unlock_bh(lock)
#define spin_trylock_bh(lock) __cond_lock(_spin_trylock_bh(lock))
#define spin_trylock_bh(lock) __cond_lock(lock, _spin_trylock_bh(lock))
#define spin_trylock_irq(lock) \
({ \
@ -264,7 +264,7 @@ do { \
*/
extern int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock);
#define atomic_dec_and_lock(atomic, lock) \
__cond_lock(_atomic_dec_and_lock(atomic, lock))
__cond_lock(lock, _atomic_dec_and_lock(atomic, lock))
/**
* spin_can_lock - would spin_trylock() succeed?