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| author | Mike Snitzer <snitzer@redhat.com> | 2017-12-11 15:58:41 -0500 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2017-12-20 10:51:12 -0500 |
| commit | d0442f8039ee54716dd3f3100cfd8e11d9a2486c (patch) | |
| tree | 081871b398486ca0ef56fa1bd72d90961999aee5 /drivers/md/dm-mpath.c | |
| parent | 63f6e6fd05624a1c915ae95dfb81264f659914d8 (diff) | |
| download | linux-stable-d0442f8039ee54716dd3f3100cfd8e11d9a2486c.tar.gz linux-stable-d0442f8039ee54716dd3f3100cfd8e11d9a2486c.tar.bz2 linux-stable-d0442f8039ee54716dd3f3100cfd8e11d9a2486c.zip | |
dm mpath: remove unnecessary memset() calls for per-io-data
All underlying members are initialized directly so the memset() calls
are not needed. Also, initialize mpio->nr_bytes from the start since it
never changes.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-mpath.c')
| -rw-r--r-- | drivers/md/dm-mpath.c | 16 |
1 files changed, 6 insertions, 10 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c index 8ed72275026d..a3acbfb638be 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -278,12 +278,11 @@ static void multipath_init_per_bio_data(struct bio *bio, struct dm_mpath_io **mp struct dm_mpath_io *mpio = get_mpio_from_bio(bio); struct dm_bio_details *bio_details = get_bio_details_from_bio(bio); - memset(mpio, 0, sizeof(*mpio)); - memset(bio_details, 0, sizeof(*bio_details)); - dm_bio_record(bio_details, bio); + mpio->nr_bytes = bio->bi_iter.bi_size; + mpio->pgpath = NULL; + *mpio_p = mpio; - if (mpio_p) - *mpio_p = mpio; + dm_bio_record(bio_details, bio); } /*----------------------------------------------- @@ -518,7 +517,6 @@ static int multipath_clone_and_map(struct dm_target *ti, struct request *rq, return DM_MAPIO_REQUEUE; } - memset(mpio, 0, sizeof(*mpio)); mpio->pgpath = pgpath; mpio->nr_bytes = nr_bytes; @@ -556,7 +554,6 @@ static void multipath_release_clone(struct request *clone) */ static int __multipath_map_bio(struct multipath *m, struct bio *bio, struct dm_mpath_io *mpio) { - size_t nr_bytes = bio->bi_iter.bi_size; struct pgpath *pgpath; unsigned long flags; bool queue_io; @@ -565,7 +562,7 @@ static int __multipath_map_bio(struct multipath *m, struct bio *bio, struct dm_m pgpath = READ_ONCE(m->current_pgpath); queue_io = test_bit(MPATHF_QUEUE_IO, &m->flags); if (!pgpath || !queue_io) - pgpath = choose_pgpath(m, nr_bytes); + pgpath = choose_pgpath(m, mpio->nr_bytes); if ((pgpath && queue_io) || (!pgpath && test_bit(MPATHF_QUEUE_IF_NO_PATH, &m->flags))) { @@ -589,7 +586,6 @@ static int __multipath_map_bio(struct multipath *m, struct bio *bio, struct dm_m } mpio->pgpath = pgpath; - mpio->nr_bytes = nr_bytes; bio->bi_status = 0; bio_set_dev(bio, pgpath->path.dev->bdev); @@ -598,7 +594,7 @@ static int __multipath_map_bio(struct multipath *m, struct bio *bio, struct dm_m if (pgpath->pg->ps.type->start_io) pgpath->pg->ps.type->start_io(&pgpath->pg->ps, &pgpath->path, - nr_bytes); + mpio->nr_bytes); return DM_MAPIO_REMAPPED; } |