mutex_tryenter(ZFS_OBJ_MUTEX((zsb), (obj_num)))
#define ZFS_OBJ_HOLD_EXIT(zsb, obj_num) \
mutex_exit(ZFS_OBJ_MUTEX((zsb), (obj_num)))
mutex_tryenter(ZFS_OBJ_MUTEX((zsb), (obj_num)))
#define ZFS_OBJ_HOLD_EXIT(zsb, obj_num) \
mutex_exit(ZFS_OBJ_MUTEX((zsb), (obj_num)))