diff mbox series

[2/5] dm: dont rewrite dm_disk(md)->part0.in_flight

Message ID 20181106213854.621440000@debian-a64.vm (mailing list archive)
State Accepted, archived
Delegated to: Mike Snitzer
Headers show
Series device mapper percpu patches | expand

Commit Message

Mikulas Patocka Nov. 6, 2018, 9:35 p.m. UTC 
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>

---
 drivers/md/dm.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)


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diff mbox series

Patch

Index: linux-2.6/drivers/md/dm.c
===================================================================
--- linux-2.6.orig/drivers/md/dm.c	2018-10-10 22:24:34.090000000 +0200
+++ linux-2.6/drivers/md/dm.c	2018-10-10 23:06:24.420000000 +0200
@@ -612,8 +612,7 @@  static void start_io_acct(struct dm_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),
@@ -642,7 +641,6 @@  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 */