SET_KEY_CSUM      192 drivers/md/bcache/bset.c 	SET_KEY_CSUM(dest, 0);
SET_KEY_CSUM      611 drivers/md/bcache/extents.c 			SET_KEY_CSUM(l, 0);
SET_KEY_CSUM      252 drivers/md/bcache/request.c 		SET_KEY_CSUM(k, op->csum);