]> git.openfabrics.org - ~shefty/rdma-dev.git/commit
mm/hugetlb.c: avoid double unlock_page() in hugetlb_fault()
authorDean Nelson <dnelson@redhat.com>
Thu, 2 Dec 2010 22:31:12 +0000 (14:31 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 2 Dec 2010 22:51:14 +0000 (14:51 -0800)
commit1f64d69c7ad2e48e697493e45590679f7a69b7b2
tree62e6c3d1dd31e1f87992710cde6b0b905f482606
parent94c35de9a918665d9354efe2bafc29ba4b37497a
mm/hugetlb.c: avoid double unlock_page() in hugetlb_fault()

Have hugetlb_fault() call unlock_page(page) only if it had previously
called lock_page(page).

Setting CONFIG_DEBUG_VM=y and then running the libhugetlbfs test suite,
resulted in the tripping of VM_BUG_ON(!PageLocked(page)) in
unlock_page() having been called by hugetlb_fault() when page ==
pagecache_page.  This patch remedied the problem.

Signed-off-by: Dean Nelson <dnelson@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/hugetlb.c