We are missing 'simple' values which include square brackets.  Refactor to
ensure we handle nesting correctly and detect these simple forms.
Signed-off-by: NAndy Whitcroft <apw@shadowen.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>