tree 203d4724dcfaae3ad4b349e1971bb3efc0da7db2
parent 23ce932a5e3ec3b9f06e92c8797d834d43abfb0f
author KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> 1260842385 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1260896000 -0800

mm: simplify try_to_unmap_one()

SWAP_MLOCK mean "We marked the page as PG_MLOCK, please move it to
unevictable-lru". So, following code is easy confusable.

        if (vma->vm_flags & VM_LOCKED) {
                ret = SWAP_MLOCK;
                goto out_unmap;
        }

Plus, if the VMA doesn't have VM_LOCKED, We don't need to check
the needed of calling mlock_vma_page().

Also, add some commentary to try_to_unmap_one().

Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>