Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit f8ae7525 authored by Mike Snitzer's avatar Mike Snitzer
Browse files

dm thin: cleanup schedule_zero() to read more logically 



The overwrite has only ever about optimizing away the need to zero a
block if the entire block was being overwritten.  As such it is only
relevant when zeroing is enabled.

Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
Signed-off-by: default avatarJoe Thornber <ejt@redhat.com>
parent 8b908f8e

drivers/md/dm-thin.c

+7 −9
Original line number Diff line number Diff line
@@ -1086,16 +1086,14 @@ static void schedule_zero(struct thin_c *tc, dm_block_t virt_block, 
	 * zeroing pre-existing data, we can issue the bio immediately.

	 * Otherwise we use kcopyd to zero the data first.

	 */

	if (!pool->pf.zero_new_blocks)

		process_prepared_mapping(m);



	else if (io_overwrites_block(pool, bio))

	if (pool->pf.zero_new_blocks) {

		if (io_overwrites_block(pool, bio))

			remap_and_issue_overwrite(tc, bio, data_block, m);



		else

		ll_zero(tc, m,

			data_block * pool->sectors_per_block,

			ll_zero(tc, m, data_block * pool->sectors_per_block,

				(data_block + 1) * pool->sectors_per_block);

	} else

		process_prepared_mapping(m);

}



static void schedule_external_copy(struct thin_c *tc, dm_block_t virt_block,