aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-x86_64
diff options
context:
space:
mode:
authorRik Van Riel <riel@redhat.com>2005-10-29 21:15:44 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-10-30 00:40:35 -0400
commiteb92f4ef320b738e41ad43476a5d05c8a20d5cc7 (patch)
treef9a6bb78a0561587f142b2b1208819f6cffe9835 /include/asm-x86_64
parent63f324cf0792ed69089b79d6921ba3aaea97af50 (diff)
[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-x86_64')
-rw-r--r--include/asm-x86_64/rwsem.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-x86_64/rwsem.h b/include/asm-x86_64/rwsem.h
index c002175b6e82..46077e9c1910 100644
--- a/include/asm-x86_64/rwsem.h
+++ b/include/asm-x86_64/rwsem.h
@@ -274,5 +274,10 @@ LOCK_PREFIX "xaddl %0,(%2)"
274 return tmp+delta; 274 return tmp+delta;
275} 275}
276 276
277static inline int rwsem_is_locked(struct rw_semaphore *sem)
278{
279 return (sem->count != 0);
280}
281
277#endif /* __KERNEL__ */ 282#endif /* __KERNEL__ */
278#endif /* _X8664_RWSEM_H */ 283#endif /* _X8664_RWSEM_H */