[PATCH 2/8] dm: don't pass bio to __dm_start_io_acct and dm_end_io_acct

Ming Lei
2022-04-12T10:09:48Z

dm->orig_bio is always passed to __dm_start_io_acct and dm_end_io_acct,
so it isn't necessary to take one bio parameter for the two helpers.

Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
drivers/md/dm.c | 19 ++++++++-----------
1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 3c5fad7c4ee6..62f7af815ef8 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -526,16 +526,13 @@ static void dm_io_acct(bool end, struct mapped_device *md, struct bio *bio,
bio->bi_iter.bi_size = bi_size;
}

-static void __dm_start_io_acct(struct dm_io *io, struct bio *bio)
+static void __dm_start_io_acct(struct dm_io *io)
{
- dm_io_acct(false, io->md, bio, io->start_time, &io->stats_aux);
+ dm_io_acct(false, io->md, io->orig_bio, io->start_time, &io->stats_aux);
}

static void dm_start_io_acct(struct dm_io *io, struct bio *clone)
{
- /* Must account IO to DM device in terms of orig_bio */
- struct bio *bio = io->orig_bio;
-
/*
* Ensure IO accounting is only ever started once.
* Expect no possibility for race unless DM_TIO_IS_DUPLICATE_BIO.
@@ -555,12 +552,12 @@ static void dm_start_io_acct(struct dm_io *io, struct bio *clone)
spin_unlock_irqrestore(&io->lock, flags);
}

- __dm_start_io_acct(io, bio);
+ __dm_start_io_acct(io);
}

-static void dm_end_io_acct(struct dm_io *io, struct bio *bio)
+static void dm_end_io_acct(struct dm_io *io)
{
- dm_io_acct(true, io->md, bio, io->start_time, &io->stats_aux);
+ dm_io_acct(true, io->md, io->orig_bio, io->start_time, &io->stats_aux);
}

static struct dm_io *alloc_io(struct mapped_device *md, struct bio *bio)
@@ -875,14 +872,14 @@ static void dm_io_complete(struct dm_io *io)

io_error = io->status;
if (dm_io_flagged(io, DM_IO_ACCOUNTED))
- dm_end_io_acct(io, bio);
+ dm_end_io_acct(io);
else if (!io_error) {
/*
* Must handle target that DM_MAPIO_SUBMITTED only to
* then bio_endio() rather than dm_submit_bio_remap()
*/
- __dm_start_io_acct(io, bio);
- dm_end_io_acct(io, bio);
+ __dm_start_io_acct(io);
+ dm_end_io_acct(io);
}
free_io(io);
smp_wmb();
--
2.31.1