cgroup: remove redundant check in cgroup_ino()

After we implemented default unified hierarchy, cgrp->kn can never
be NULL.

Signed-off-by: Zefan Li <lizefan@huawei.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 44c6bd201d3a..8639f6b28746 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -148,7 +148,7 @@ static int hwpoison_filter_task(struct page *p)
         ino = cgroup_ino(css->cgroup);
         css_put(css);
 
-        if (!ino || ino != hwpoison_filter_memcg)
+        if (ino != hwpoison_filter_memcg)
                 return -EINVAL;
 
         return 0;