1#ifdef CONFIG_RWSEM_SPIN_ON_OWNER
 2static inline void rwsem_set_owner(struct rw_semaphore *sem)
 3{
 4	sem->owner = current;
 5}
 6
 7static inline void rwsem_clear_owner(struct rw_semaphore *sem)
 8{
 9	sem->owner = NULL;
10}
11
12#else
13static inline void rwsem_set_owner(struct rw_semaphore *sem)
14{
15}
16
17static inline void rwsem_clear_owner(struct rw_semaphore *sem)
18{
19}
20#endif