hulk inclusion category: bugfix bugzilla: 188421, https://gitee.com/openeuler/kernel/issues/I7WMMI CVE: NA

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'ios' and 'sectors' is counted in bio_start_io_acct() while io is started insted of io is done. Hence switch to precise io accounting to count them when io is done.

Signed-off-by: Li Nan linan122@huawei.com --- drivers/md/dm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 06318a0efc67..c925ff1bf900 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -587,7 +587,7 @@ static void start_io_acct(struct dm_io *io) struct mapped_device *md = io->md; struct bio *bio = io->orig_bio;

- io->start_time = bio_start_io_acct(bio); + io->start_time = bio_start_precise_io_acct(bio); if (unlikely(dm_stats_used(&md->stats))) dm_stats_account_io(&md->stats, bio_data_dir(bio), bio->bi_iter.bi_sector, bio_sectors(bio), @@ -606,7 +606,7 @@ static void end_io_acct(struct mapped_device *md, struct bio *bio,

smp_wmb();

- bio_end_io_acct(bio, start_time); + bio_end_precise_io_acct(bio, start_time);

/* nudge anyone waiting on suspend queue */ if (unlikely(wq_has_sleeper(&md->wait)))