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dm: eliminate 'split_discard_bios' flag from DM target interface

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There is no need to have DM core split discards on behalf of a DM target
now that blk_queue_split() handles splitting discards based on the
queue_limits.  A DM target just needs to set max_discard_sectors,
discard_granularity, etc, in queue_limits.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mike Snitzer
2019-01-18 14:19:26 -05:00
parent 568c73a355
commit 61697a6abd
7 changed files with 17 additions and 35 deletions
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6
include/linux/device-mapper.h
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@@ -315,12 +315,6 @@ struct dm_target {
* whether or not its underlying devices have support.
*/
bool discards_supported:1;
/*
* Set if the target required discard bios to be split
* on max_io_len boundary.
*/
bool split_discard_bios:1;
};
/* Each target can link one of these into the table */