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author | 2005-10-29 18:15:44 -0700 | |
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committer | 2005-10-29 21:40:35 -0700 | |
commit | eb92f4ef320b738e41ad43476a5d05c8a20d5cc7 (patch) | |
tree | f9a6bb78a0561587f142b2b1208819f6cffe9835 /include/asm-alpha | |
parent | [PATCH] fix alpha breakage (diff) | |
download | linux-eb92f4ef320b738e41ad43476a5d05c8a20d5cc7.tar.gz linux-eb92f4ef320b738e41ad43476a5d05c8a20d5cc7.tar.bz2 linux-eb92f4ef320b738e41ad43476a5d05c8a20d5cc7.zip |
[PATCH] add sem_is_read/write_locked()
Add sem_is_read/write_locked functions to the read/write semaphores, along the
same lines of the *_is_locked spinlock functions. The swap token tuning patch
uses sem_is_read_locked; sem_is_write_locked is added for completeness.
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-alpha')
-rw-r--r-- | include/asm-alpha/rwsem.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-alpha/rwsem.h b/include/asm-alpha/rwsem.h index 8e058a67c9a4..fafdd4f7010a 100644 --- a/include/asm-alpha/rwsem.h +++ b/include/asm-alpha/rwsem.h @@ -262,5 +262,10 @@ static inline long rwsem_atomic_update(long val, struct rw_semaphore *sem) #endif } +static inline int rwsem_is_locked(struct rw_semaphore *sem) +{ + return (sem->count != 0); +} + #endif /* __KERNEL__ */ #endif /* _ALPHA_RWSEM_H */ |