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authorKyle McMartin <kyle@parisc-linux.org>2006-03-24 21:22:02 -0700
committerKyle McMartin <kyle@hera.kernel.org>2006-03-30 17:48:53 +0000
commitbc8846c522264d2522b0082321ec8c2051a4536f (patch)
treea35d34fef7473635b58f4de04d50c5c897e74ce3
parent102c8c76f787add0790406d5c47e03cb6f8765c2 (diff)
downloadlinux-2.6.34-ux500-bc8846c522264d2522b0082321ec8c2051a4536f.tar.gz
[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>
-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 16c2ac075fc..a93960e232c 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 */