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authorKyle McMartin <kyle@parisc-linux.org>2006-03-24 23:22:02 -0500
committerKyle McMartin <kyle@hera.kernel.org>2006-03-30 12:48:53 -0500
commitbc8846c522264d2522b0082321ec8c2051a4536f (patch)
treea35d34fef7473635b58f4de04d50c5c897e74ce3 /include
parent102c8c76f787add0790406d5c47e03cb6f8765c2 (diff)
[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')
-rw-r--r--include/asm-parisc/spinlock.h16
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)
134 return 1; 134 return 1;
135} 135}
136 136
137static __inline__ int __raw_is_read_locked(raw_rwlock_t *rw) 137/*
138 * read_can_lock - would read_trylock() succeed?
139 * @lock: the rwlock in question.
140 */
141static __inline__ int __raw_read_can_lock(raw_rwlock_t *rw)
138{ 142{
139 return rw->counter > 0; 143 return rw->counter >= 0;
140} 144}
141 145
142static __inline__ int __raw_is_write_locked(raw_rwlock_t *rw) 146/*
147 * write_can_lock - would write_trylock() succeed?
148 * @lock: the rwlock in question.
149 */
150static __inline__ int __raw_write_can_lock(raw_rwlock_t *rw)
143{ 151{
144 return rw->counter < 0; 152 return !rw->counter;
145} 153}
146 154
147#endif /* __ASM_SPINLOCK_H */ 155#endif /* __ASM_SPINLOCK_H */