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 a010002d892be14ff0fb67bab9c7d9d2d2efea95..2b53c3841b530b591c0c8ed688c0ea2b94b5f273 100644 (file)
--- 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;
                        }