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| author |   Nicolas Pitre <nico@cam.org> | 2006-03-31 02:32:13 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-31 12:19:01 -0800 |
| commit | e358c1a2c45f7ec32d77cc09a2bb42d6823a4193 (patch) | |
| tree | ae35f543a333abe1a76852870c5a2579c02bc38a /include/asm-generic/mutex-dec.h | |
| parent | [PATCH] Decrease number of pointer derefs in jsm_tty.c (diff) | |
| download | linux-dev-e358c1a2c45f7ec32d77cc09a2bb42d6823a4193.tar.xz linux-dev-e358c1a2c45f7ec32d77cc09a2bb42d6823a4193.zip | |
[PATCH] mutex: some cleanups
Turn some macros into inline functions and add proper type checking as
well as being more readable. Also a minor comment adjustment.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-generic/mutex-dec.h')
| -rw-r--r-- | include/asm-generic/mutex-dec.h | 30 |
1 files changed, 16 insertions, 14 deletions
diff --git a/include/asm-generic/mutex-dec.h b/include/asm-generic/mutex-dec.h index 40c6d1f86598..29c6ac34e236 100644 --- a/include/asm-generic/mutex-dec.h +++ b/include/asm-generic/mutex-dec.h @@ -17,13 +17,14 @@ * it wasn't 1 originally. This function MUST leave the value lower than * 1 even when the "1" assertion wasn't true. */ -#define __mutex_fastpath_lock(count, fail_fn) \ -do { \ - if (unlikely(atomic_dec_return(count) < 0)) \ - fail_fn(count); \ - else \ - smp_mb(); \ -} while (0) +static inline void +__mutex_fastpath_lock(atomic_t *count, fastcall void (*fail_fn)(atomic_t *)) +{ + if (unlikely(atomic_dec_return(count) < 0)) + fail_fn(count); + else + smp_mb(); +} /** * __mutex_fastpath_lock_retval - try to take the lock by moving the count @@ -36,7 +37,7 @@ do { \ * or anything the slow path function returns. */ static inline int -__mutex_fastpath_lock_retval(atomic_t *count, int (*fail_fn)(atomic_t *)) +__mutex_fastpath_lock_retval(atomic_t *count, fastcall int (*fail_fn)(atomic_t *)) { if (unlikely(atomic_dec_return(count) < 0)) return fail_fn(count); @@ -59,12 +60,13 @@ __mutex_fastpath_lock_retval(atomic_t *count, int (*fail_fn)(atomic_t *)) * __mutex_slowpath_needs_to_unlock() macro needs to return 1, it needs * to return 0 otherwise. */ -#define __mutex_fastpath_unlock(count, fail_fn) \ -do { \ - smp_mb(); \ - if (unlikely(atomic_inc_return(count) <= 0)) \ - fail_fn(count); \ -} while (0) +static inline void +__mutex_fastpath_unlock(atomic_t *count, fastcall void (*fail_fn)(atomic_t *)) +{ + smp_mb(); + if (unlikely(atomic_inc_return(count) <= 0)) + fail_fn(count); +} #define __mutex_slowpath_needs_to_unlock() 1 |