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authorMikulas Patocka <mpatocka@redhat.com>2018-12-06 19:41:16 +0300
committerJens Axboe <axboe@kernel.dk>2018-12-10 18:30:37 +0300
commit80a787ba3809deb694ee632919badb73890daf05 (patch)
treed7ff1137fc58685d26b86a8fe845a21c8e6cfa90 /drivers/md/dm.c
parent96f774106ed48808a5e314741e3414c617d14460 (diff)
downloadlinux-80a787ba3809deb694ee632919badb73890daf05.tar.xz
dm: dont rewrite dm_disk(md)->part0.in_flight
generic_start_io_acct and generic_end_io_acct already update the variable in_flight using atomic operations, so we don't have to overwrite them again. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/md/dm.c')
-rw-r--r--drivers/md/dm.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index ab72d79775ee..33100e536c4e 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -663,8 +663,7 @@ static void start_io_acct(struct dm_io *io)
generic_start_io_acct(md->queue, bio_op(bio), bio_sectors(bio),
&dm_disk(md)->part0);
- atomic_set(&dm_disk(md)->part0.in_flight[rw],
- atomic_inc_return(&md->pending[rw]));
+ atomic_inc(&md->pending[rw]);
if (unlikely(dm_stats_used(&md->stats)))
dm_stats_account_io(&md->stats, bio_data_dir(bio),
@@ -693,7 +692,6 @@ static void end_io_acct(struct dm_io *io)
* a flush.
*/
pending = atomic_dec_return(&md->pending[rw]);
- atomic_set(&dm_disk(md)->part0.in_flight[rw], pending);
pending += atomic_read(&md->pending[rw^0x1]);
/* nudge anyone waiting on suspend queue */