From: Mike Snitzer <snitzer@redhat.com>
Date: Fri, 18 Jan 2019 06:21:11 +0000 (-0500)
Subject: dm: add missing trace_block_split() to __split_and_process_bio()
X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=075c18c3e124a1511ebc10a89f1858c8a77dcb01;p=openwrt%2Fstaging%2Fblogic.git

dm: add missing trace_block_split() to __split_and_process_bio()

Provides useful context about bio splits in blktrace.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
---

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index a010002d892b..2b53c3841b53 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1655,6 +1655,7 @@ static blk_qc_t __split_and_process_bio(struct mapped_device *md,
 				part_stat_unlock();
 
 				bio_chain(b, bio);
+				trace_block_split(md->queue, b, bio->bi_iter.bi_sector);
 				ret = generic_make_request(bio);
 				break;
 			}