Commit bc8846c5 authored by Kyle McMartin's avatar Kyle McMartin Committed by Kyle McMartin

[PARISC] More useful readwrite lock helpers

spinlock.c needs _can_lock helpers. Rewrite _is_locked helpers to be
_can_lock helpers.
Signed-off-by: default avatarKyle McMartin <kyle@parisc-linux.org>
parent 102c8c76
...@@ -134,14 +134,22 @@ static __inline__ int __raw_write_trylock(raw_rwlock_t *rw) ...@@ -134,14 +134,22 @@ static __inline__ int __raw_write_trylock(raw_rwlock_t *rw)
return 1; 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 */ #endif /* __ASM_SPINLOCK_H */
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