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| author | Ralf Baechle <ralf@linux-mips.org> | 2005-02-03 14:34:45 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2005-10-29 20:30:22 +0200 |
| commit | e3c4807825501f0b445fe34b627669be24b59320 (patch) | |
| tree | 438898b7a348ca7b4a452d4f7c143dc1a694c60e /include/asm-mips/spinlock.h | |
| parent | Update descriptions for MIPS Technologies evaluation boards. (diff) | |
| download | linux-e3c4807825501f0b445fe34b627669be24b59320.tar.xz linux-e3c4807825501f0b445fe34b627669be24b59320.zip | |
Define __raw_read_can_lock / __raw_write_can_lock.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips/spinlock.h')
| -rw-r--r-- | include/asm-mips/spinlock.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/asm-mips/spinlock.h b/include/asm-mips/spinlock.h index 4d0135b11156..075e9701d6bc 100644 --- a/include/asm-mips/spinlock.h +++ b/include/asm-mips/spinlock.h @@ -119,6 +119,18 @@ static inline unsigned int __raw_spin_trylock(raw_spinlock_t *lock) * read-locks. */ +/* + * read_can_lock - would read_trylock() succeed? + * @lock: the rwlock in question. + */ +#define __raw_read_can_lock(rw) ((rw)->lock >= 0) + +/* + * write_can_lock - would write_trylock() succeed? + * @lock: the rwlock in question. + */ +#define __raw_write_can_lock(rw) (!(rw)->lock) + static inline void __raw_read_lock(raw_rwlock_t *rw) { unsigned int tmp; |