From eb92f4ef320b738e41ad43476a5d05c8a20d5cc7 Mon Sep 17 00:00:00 2001 From: Rik Van Riel Date: Sat, 29 Oct 2005 18:15:44 -0700 Subject: [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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-ia64/rwsem.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/asm-ia64') diff --git a/include/asm-ia64/rwsem.h b/include/asm-ia64/rwsem.h index e18b5ab0cb75..1327c91ea39c 100644 --- a/include/asm-ia64/rwsem.h +++ b/include/asm-ia64/rwsem.h @@ -186,4 +186,9 @@ __downgrade_write (struct rw_semaphore *sem) #define rwsem_atomic_add(delta, sem) atomic64_add(delta, (atomic64_t *)(&(sem)->count)) #define rwsem_atomic_update(delta, sem) atomic64_add_return(delta, (atomic64_t *)(&(sem)->count)) +static inline int rwsem_is_locked(struct rw_semaphore *sem) +{ + return (sem->count != 0); +} + #endif /* _ASM_IA64_RWSEM_H */ -- cgit v1.2.2