mm/rmap.c: fix comment
mm/rmap.c: fix comment

The page_address_in_vma() is not only used in unuse_vma().

Signed-off-by: Huang Shijie <8f4ee92b8040314c85d57ef7f2c7fb57fbf091a5@gmail.com>
Acked-by: Hugh Dickins <a96f0e3e09e76642c8a5dcf04c8f12accf315063@tiscali.co.uk>
Signed-off-by: Andrew Morton <5c1e68b099950c134891f0b6e179498a8ebe9cf9@linux-foundation.org>
Signed-off-by: Linus Torvalds <69652caca27c8b940640ad396ab71f93cacec34f@linux-foundation.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas