blk_barrier_rq 208 block/blk-barrier.c const int is_barrier = blk_fs_request(rq) && blk_barrier_rq(rq); blk_barrier_rq 691 block/elevator.c if (blk_barrier_rq(rq)) blk_barrier_rq 579 include/linux/blkdev.h #define blk_empty_barrier(rq) (blk_barrier_rq(rq) && blk_fs_request(rq) && !(rq)->hard_nr_sectors)