tree d654c3331c1910fdae732c6576d1f023b0cfae7d
parent bcf835e52e0974b2e2e056b190dd66372b28cfce
author Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> 1284092583 +0900
committer Linus Torvalds <torvalds@linux-foundation.org> 1285288158 -0700

hugetlb, rmap: always use anon_vma root pointer

This patch applies Andrea's fix given by the following patch into hugepage
rmapping code:

  commit 288468c334e98aacbb7e2fb8bde6bc1adcd55e05
  Author: Andrea Arcangeli <aarcange@redhat.com>
  Date:   Mon Aug 9 17:19:09 2010 -0700

This patch uses anon_vma->root and avoids unnecessary overwriting when
anon_vma is already set up.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Andrea Arcangeli <aarcange@redhat.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>