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Commit a850ea30374ebed32a0724742601861853fde869

Authored by Naoya Horiguchi
Committed by Linus Torvalds
1 parent 56c9cfb13c
Exists in master and in 7 other branches imx_3.0.35_4.1.0, imx_3.10.17_1.0.1_ga, imx_3.10.53_1.1.0_ga, imx_3.14.28_1.0.0_ga, smarc-imx_3.10.53_1.1.0_ga, smarc-imx_3.14.28_1.0.0_ga, smarc-l5.0.0_1.0.0-ga

hugetlb, rmap: add BUG_ON(!PageLocked) in hugetlb_add_anon_rmap() 

Confirming page lock is held in hugetlb_add_anon_rmap() may be useful
to detect possible future problems.

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

Showing 1 changed file with 2 additions and 0 deletions Side-by-side Diff

... ... @@ -1582,6 +1582,8 @@
1582 1582 {
1583 1583 struct anon_vma *anon_vma = vma->anon_vma;
1584 1584 int first;
  1585 +
  1586 + BUG_ON(!PageLocked(page));
1585 1587 BUG_ON(!anon_vma);
1586 1588 BUG_ON(address < vma->vm_start || address >= vma->vm_end);
1587 1589 first = atomic_inc_and_test(&page->_mapcount);