diff options
Diffstat (limited to 'include/linux/rwsem.h')
| -rw-r--r-- | include/linux/rwsem.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/rwsem.h b/include/linux/rwsem.h index 8970c3e802e..8b9c7e9f691 100644 --- a/include/linux/rwsem.h +++ b/include/linux/rwsem.h @@ -34,6 +34,13 @@ struct rw_semaphore { /* Include the arch specific part */ #include <asm/rwsem.h> + +/* In all implementations count != 0 means locked */ +static inline int rwsem_is_locked(struct rw_semaphore *sem) +{ + return sem->count != 0; +} + #endif /* Common initializer macros and functions */ |