__register_nosave_region().
  This is often because register_nosave_region lacks a __init
  annotation or the annotation of __register_nosave_region is wrong.

register_nosave_region calls __init function and is called only from
__init functions

Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Pavel Machek <pavel@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>