[PATCH] kernfs: kernfs_sop_show_path: don't return 0 after seq_dentry call

[Serge E. Hallyn]

Our caller expects 0 on success, not >0.

This fixes a bug in the patch

        cgroup, kernfs: make mountinfo show properly scoped path for cgroup 
namespaces

where /sys does not show up in mountinfo, breaking criu.

Thanks for catching this, Andrei.

Reported-by: Andrei Vagin <ava...@gmail.com>
Signed-off-by: Serge Hallyn <serge.hal...@ubuntu.com>
---
 fs/kernfs/mount.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c
index 3b78724..3d670a3 100644
--- a/fs/kernfs/mount.c
+++ b/fs/kernfs/mount.c
@@ -50,7 +50,8 @@ static int kernfs_sop_show_path(struct seq_file *sf, struct 
dentry *dentry)
        if (scops && scops->show_path)
                return scops->show_path(sf, node, root);
 
-       return seq_dentry(sf, dentry, " \t\n\\");
+       seq_dentry(sf, dentry, " \t\n\\");
+       return 0;
 }
 
 const struct super_operations kernfs_sops = {
-- 
2.7.4