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dm: simplify dm_io access in dm_split_and_process_bio

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Use local variable instead of redudant access using ci.io

Signed-off-by: Mike Snitzer <snitzer@kernel.org>
This commit is contained in:
Mike Snitzer 2022-03-25 13:53:23 -04:00
parent 84b98f4ce4
commit 4857abf664
1 changed files with 8 additions and 6 deletions
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14
drivers/md/dm.c
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@ -1565,10 +1565,12 @@ static void dm_split_and_process_bio(struct mapped_device *md,
struct dm_table *map, struct bio *bio)
{
struct clone_info ci;
struct dm_io *io;
struct bio *orig_bio = NULL;
blk_status_t error = BLK_STS_OK;
init_clone_info(&ci, md, map, bio);
io = ci.io;
if (bio->bi_opf & REQ_PREFLUSH) {
__send_empty_flush(&ci);
@ -1577,14 +1579,14 @@ static void dm_split_and_process_bio(struct mapped_device *md,
}
error = __split_and_process_bio(&ci);
ci.io->map_task = NULL;
io->map_task = NULL;
if (error || !ci.sector_count)
goto out;
/*
* Remainder must be passed to submit_bio_noacct() so it gets handled
* *after* bios already submitted have been completely processed.
* We take a clone of the original to store in ci.io->orig_bio to be
* We take a clone of the original to store in io->orig_bio to be
* used by dm_end_io_acct() and for dm_io_complete() to use for
* completion handling.
*/
@ -1596,9 +1598,9 @@ static void dm_split_and_process_bio(struct mapped_device *md,
out:
if (!orig_bio)
orig_bio = bio;
smp_store_release(&ci.io->orig_bio, orig_bio);
if (dm_io_flagged(ci.io, DM_IO_START_ACCT))
dm_start_io_acct(ci.io, NULL);
smp_store_release(&io->orig_bio, orig_bio);
if (dm_io_flagged(io, DM_IO_START_ACCT))
dm_start_io_acct(io, NULL);
/*
* Drop the extra reference count for non-POLLED bio, and hold one
@ -1610,7 +1612,7 @@ out:
if (error || !ci.submit_as_polled)
dm_io_dec_pending(ci.io, error);
else
dm_queue_poll_io(bio, ci.io);
dm_queue_poll_io(bio, io);
}
static void dm_submit_bio(struct bio *bio)