From: Shaohua Li <shli@fb.com>
Date: Fri, 18 Aug 2017 17:27:59 +0000 (-0700)
Subject: md/raid0: attach correct cgroup info in bio
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8a8e6f84ad10e7a10bde438b42926da0e9bc820f;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

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 9a63597aaacc..51189a1d9009 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 94d9ae9b0fd0..6fb81704aff4 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),