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dm: allow immutable request-based targets to use blk-mq pdu

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This will allow DM multipath to use a portion of the blk-mq pdu space
for target data (e.g. struct dm_mpath_io).

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mike Snitzer
2016-01-31 12:05:42 -05:00
parent 30187e1d48
commit 591ddcfc4b
3 changed files with 28 additions and 9 deletions
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drivers/md/dm.h
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@@ -86,7 +86,7 @@ void dm_set_md_type(struct mapped_device *md, unsigned type);
unsigned dm_get_md_type(struct mapped_device *md);
struct target_type *dm_get_immutable_target_type(struct mapped_device *md);
int dm_setup_md_queue(struct mapped_device *md);
int dm_setup_md_queue(struct mapped_device *md, struct dm_table *t);
/*
* To check the return value from dm_table_find_target().