Add a forgotten item into CONTENTS.
Signed-off-by: NKirill A. Shutemov <kirill@shutemov.name>
Acked-by: NPaul Menage <menage@google.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>