Tejun Heo wrote:

quoted

From 6da2689412c78b97716ec524cc30baf7b46508cd Mon Sep 17 00:00:00 2001

From: Tejun Heo <redacted>
Date: Tue, 3 Jul 2012 10:32:26 -0700

While refactoring cgroup file removal path, 05ef1d7c4a "cgroup:
introduce struct cfent" incorrectly changed the @dir argument of
simple_unlink() to the inode of the file being deleted instead of that
of the containing directory.

The effect of this bug is minor - ctime and mtime of the parent
weren't properly updated on file deletion.

Fix it by using @cgrp->dentry->d_inode instead.

Signed-off-by: Tejun Heo <redacted>
Reported-by: Al Viro <redacted>

Acked-By: Li Zefan <redacted>