md/raid0: attach correct cgroup info in bio
The discard bio doesn't attach the original bio cgroup info. Normal bio
is cloned, so is fine.
Signed-off-by: Shaohua Li <shli@fb.com>
diff --git a/block/bio.c b/block/bio.c
index 9a63597..51189a1 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -2085,7 +2085,7 @@ void bio_clone_blkcg_association(struct bio *dst, struct bio *src)
if (src->bi_css)
WARN_ON(bio_associate_blkcg(dst, src->bi_css));
}
-
+EXPORT_SYMBOL_GPL(bio_clone_blkcg_association);
#endif /* CONFIG_BLK_CGROUP */
static void __init biovec_init_slabs(void)
diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c
index 94d9ae9..6fb8170 100644
--- a/drivers/md/raid0.c
+++ b/drivers/md/raid0.c
@@ -539,6 +539,7 @@ static void raid0_handle_discard(struct mddev *mddev, struct bio *bio)
!discard_bio)
continue;
bio_chain(discard_bio, bio);
+ bio_clone_blkcg_association(discard_bio, bio);
if (mddev->gendisk)
trace_block_bio_remap(bdev_get_queue(rdev->bdev),
discard_bio, disk_devt(mddev->gendisk),
