diff options
| author | Mike Snitzer <snitzer@redhat.com> | 2016-02-20 13:45:38 -0500 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2016-02-22 22:34:33 -0500 |
| commit | eca7ee6dc01b21c669bce8c39d3d368509fb65e8 (patch) | |
| tree | e913759074c83e9aa01874ab38f38cda4cdc9463 /drivers/md/dm-mpath.c | |
| parent | c5248f79f39e5254977a3916b2149c3ccffa2722 (diff) | |
dm: distinquish old .request_fn (dm-old) vs dm-mq request-based DM
Rename various methods to have either a "dm_old" or "dm_mq" prefix.
Improve code comments to assist with understanding the duality of code
that handles both "dm_old" and "dm_mq" cases.
It is no much easier to quickly look at the code and _know_ that a given
method is either 1) "dm_old" only 2) "dm_mq" only 3) common to both.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-mpath.c')
| -rw-r--r-- | drivers/md/dm-mpath.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c index 7259eeba6a58..fde08c9809ef 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -426,7 +426,11 @@ static int __multipath_map(struct dm_target *ti, struct request *clone, clone->rq_disk = bdev->bd_disk; clone->cmd_flags |= REQ_FAILFAST_TRANSPORT; } else { - /* blk-mq request-based interface */ + /* + * blk-mq request-based interface; used by both: + * .request_fn stacked on blk-mq path(s) and + * blk-mq stacked on blk-mq path(s). + */ *__clone = blk_get_request(bdev_get_queue(bdev), rq_data_dir(rq), GFP_ATOMIC); if (IS_ERR(*__clone)) { |