#ifndef __XFS_SUPPORT_RWLOCK_H__ #define __XFS_SUPPORT_RWLOCK_H__ #include #include #include #include typedef struct sx rwlock_t; typedef int wait_queue_head_t; #define rwlock_init(lock) sx_init(lock, "rwlock") #define rwlock_destroy(lock) sx_destroy(lock) #define read_lock(lock) sx_slock(lock) #define read_unlock(lock) sx_sunlock(lock) #define write_lock(lock) sx_xlock(lock) #define write_trylock(lock) sx_try_xlock(lock) #define write_unlock(lock) sx_xunlock(lock) #define rwlock_trypromote(lock) sx_try_upgrade(lock) #define rwlock_demote(lock) sx_downgrade(lock) #endif /* __XFS_SUPPORT_RWLOCK_H__ */