clear_discard     850 drivers/md/dm-cache-target.c 		clear_discard(cache, oblock_to_dblock(cache, oblock));
clear_discard     867 drivers/md/dm-cache-target.c 		clear_discard(cache, oblock_to_dblock(cache, oblock));
clear_discard    1272 drivers/md/dm-cache-target.c 		clear_discard(cache, oblock_to_dblock(cache, op->oblock));