kernel/locking/rwsem.h

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