commit 8a8e6f84ad10e7a10bde438b42926da0e9bc820f
author Shaohua Li <shli@fb.com> Fri Aug 18 10:27:59 2017 -0700
committer Shaohua Li <shli@fb.com> Fri Aug 25 10:21:48 2017 -0700
tree e947785c69c1ce1ef3edd8c6a3f4836956a79f48
parent b5e0fff19bef3a36631bce742e363d3a99590c3a

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>

block/bio.c

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)