area_io           744 drivers/md/dm-snap-persistent.c 	if (ps->valid && area_io(ps, REQ_OP_WRITE,
area_io           785 drivers/md/dm-snap-persistent.c 		r = area_io(ps, REQ_OP_READ, 0);
area_io           822 drivers/md/dm-snap-persistent.c 	r = area_io(ps, REQ_OP_WRITE, REQ_PREFLUSH | REQ_FUA);