sb_is_blkdev_sb   460 fs/fs-writeback.c 			if (sb_is_blkdev_sb(sb)) {
sb_is_blkdev_sb   477 fs/fs-writeback.c 			if (!sb_is_blkdev_sb(sb))
sb_is_blkdev_sb   484 fs/fs-writeback.c 			if (!sb_is_blkdev_sb(sb))