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authorJosh Triplett <josht@us.ibm.com>2006-09-29 02:01:03 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-29 09:18:20 -0700
commitdcc8e559ee5ae03fa6bdb8611d76d86d0083e793 (patch)
tree8847aba4ed68074ec9ab0ef28ee2cdd7937f51d9
parent7d2c502f141042f6e5d145aa40107685d751e5a3 (diff)
downloadlinux-dcc8e559ee5ae03fa6bdb8611d76d86d0083e793.tar.bz2
[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>
-rw-r--r--include/linux/compiler.h4
-rw-r--r--include/linux/spinlock.h10
2 files changed, 7 insertions, 7 deletions
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 060b96112ec6..0780de440220 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -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__
diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h
index 456e74f0e129..b800d2d68b32 100644
--- a/include/linux/spinlock.h
+++ b/include/linux/spinlock.h
@@ -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?