[RFC PATCH 3/5] ovl: setup overlayfs' private bdi

[Chengguang Xu <cgxu519@xxxxxxxxxxxx>]

Setup private bdi to collect overlayfs' dirty inodes.

Signed-off-by: Chengguang Xu <cgxu519@xxxxxxxxxxxx>
---
 fs/overlayfs/super.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 290983b..dc22725 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -1863,6 +1863,9 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
 	int err;
 
 	sb->s_d_op = &ovl_dentry_operations;
+	err = super_setup_bdi(sb);
+	if (err)
+		goto out;
 
 	err = -ENOMEM;
 	ofs = kzalloc(sizeof(struct ovl_fs), GFP_KERNEL);
-- 
1.8.3.1