discard_op        387 drivers/md/dm-thin.c static void begin_discard(struct discard_op *op, struct thin_c *tc, struct bio *parent)
discard_op        397 drivers/md/dm-thin.c static int issue_discard(struct discard_op *op, dm_block_t data_b, dm_block_t data_e)
discard_op        407 drivers/md/dm-thin.c static void end_discard(struct discard_op *op, int r)
discard_op       1091 drivers/md/dm-thin.c 	struct discard_op op;
discard_op       1197 drivers/md/dm-thin.c 			struct discard_op op;