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dm: use bio_clone_fast in alloc_io/alloc_tio

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Replace open coded bio_clone_fast implementations with the actual helper.
Note that the bio allocated as part of the dm_io structure in alloc_io
will only actually be used later in alloc_tio, making this earlier
cloning of the information safe.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Link: https://lore.kernel.org/r/20220202160109.108149-12-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2022-02-02 17:01:07 +01:00 committed by Jens Axboe
parent 56b4b5abcd
commit 92986f6b4c
1 changed files with 3 additions and 9 deletions
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12
drivers/md/dm.c
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@ -520,7 +520,7 @@ static struct dm_io *alloc_io(struct mapped_device *md, struct bio *bio)
struct dm_target_io *tio;
struct bio *clone;
clone = bio_alloc_bioset(NULL, 0, 0, GFP_NOIO, &md->io_bs);
clone = bio_clone_fast(bio, GFP_NOIO, &md->io_bs);
tio = clone_to_tio(clone);
tio->inside_dm_io = true;
@ -553,8 +553,8 @@ static struct bio *alloc_tio(struct clone_info *ci, struct dm_target *ti,
/* the dm_target_io embedded in ci->io is available */
tio = &ci->io->tio;
} else {
struct bio *clone = bio_alloc_bioset(NULL, 0, 0, gfp_mask,
&ci->io->md->bs);
struct bio *clone = bio_clone_fast(ci->bio, gfp_mask,
&ci->io->md->bs);
if (!clone)
return NULL;
@ -562,12 +562,6 @@ static struct bio *alloc_tio(struct clone_info *ci, struct dm_target *ti,
tio->inside_dm_io = false;
}
if (__bio_clone_fast(&tio->clone, ci->bio, gfp_mask) < 0) {
if (ci->io->tio.io)
bio_put(&tio->clone);
return NULL;
}
tio->magic = DM_TIO_MAGIC;
tio->io = ci->io;
tio->ti = ti;