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| author | Kyle McMartin | 2006-03-25 05:22:02 +0100 |
|---|---|---|
| committer | Kyle McMartin | 2006-03-30 19:48:53 +0200 |
| commit | bc8846c522264d2522b0082321ec8c2051a4536f (patch) | |
| tree | a35d34fef7473635b58f4de04d50c5c897e74ce3 /include/asm-parisc/spinlock.h | |
| parent | [PARISC] Convert HIL drivers to use input_allocate_device (diff) | |
| download | kernel-qcow2-linux-bc8846c522264d2522b0082321ec8c2051a4536f.tar.gz kernel-qcow2-linux-bc8846c522264d2522b0082321ec8c2051a4536f.tar.xz kernel-qcow2-linux-bc8846c522264d2522b0082321ec8c2051a4536f.zip | |
[PARISC] More useful readwrite lock helpers
spinlock.c needs _can_lock helpers. Rewrite _is_locked helpers to be
_can_lock helpers.
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
Diffstat (limited to 'include/asm-parisc/spinlock.h')
| -rw-r--r-- | include/asm-parisc/spinlock.h | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/include/asm-parisc/spinlock.h b/include/asm-parisc/spinlock.h index 16c2ac075fc5..a93960e232cf 100644 --- a/include/asm-parisc/spinlock.h +++ b/include/asm-parisc/spinlock.h @@ -134,14 +134,22 @@ static __inline__ int __raw_write_trylock(raw_rwlock_t *rw) return 1; } -static __inline__ int __raw_is_read_locked(raw_rwlock_t *rw) +/* + * read_can_lock - would read_trylock() succeed? + * @lock: the rwlock in question. + */ +static __inline__ int __raw_read_can_lock(raw_rwlock_t *rw) { - return rw->counter > 0; + return rw->counter >= 0; } -static __inline__ int __raw_is_write_locked(raw_rwlock_t *rw) +/* + * write_can_lock - would write_trylock() succeed? + * @lock: the rwlock in question. + */ +static __inline__ int __raw_write_can_lock(raw_rwlock_t *rw) { - return rw->counter < 0; + return !rw->counter; } #endif /* __ASM_SPINLOCK_H */ |