aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-i386
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-i386
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-i386')
-rw-r--r--include/asm-i386/rwsem.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-i386/rwsem.h b/include/asm-i386/rwsem.h
index 7625a675852f..be4ab859238e 100644
--- a/include/asm-i386/rwsem.h
+++ b/include/asm-i386/rwsem.h
@@ -284,5 +284,10 @@ LOCK_PREFIX "xadd %0,(%2)"
284 return tmp+delta; 284 return tmp+delta;
285} 285}
286 286
287static inline int rwsem_is_locked(struct rw_semaphore *sem)
288{
289 return (sem->count != 0);
290}
291
287#endif /* __KERNEL__ */ 292#endif /* __KERNEL__ */
288#endif /* _I386_RWSEM_H */ 293#endif /* _I386_RWSEM_H */