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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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4
include/uapi/linux/dm-ioctl.h
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@ -270,9 +270,9 @@ enum {
#define DM_DEV_SET_GEOMETRY _IOWR(DM_IOCTL, DM_DEV_SET_GEOMETRY_CMD, struct dm_ioctl)
#define DM_VERSION_MAJOR 4
#define DM_VERSION_MINOR 39
#define DM_VERSION_MINOR 40
#define DM_VERSION_PATCHLEVEL 0
#define DM_VERSION_EXTRA "-ioctl (2018-04-03)"
#define DM_VERSION_EXTRA "-ioctl (2019-01-18)"
/* Status bits */
#define DM_READONLY_FLAG (1 << 0) /* In/Out */