On Sun, Aug 14, 2011 at 11:23:13AM +0800, Axel Lin wrote:

We have CONFIG_DEBUG_FS guard around the place calling debugfs_create_dir, thus debugfs_create_dir returns NULL on failure.

On the other hand the existing code doesn't actually have any problem, the IS_ERR() won't give false positives, so the changelog isn't really accurate and if anything we'll introduce a bug if someone cut'n'pastes the code elsewhere.