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    SubjectRe: [patch 00/50] -stable review
    On Fri, 6 Jun 2008, Chris Wright wrote:
    > This is the start of the stable review cycle for the release.
    > There are 50 patches in this series, all will be posted as a response
    > to this one. If anyone has any issues with these being applied, please
    > let us know. If anyone is a maintainer of the proper subsystem, and
    > wants to add a Signed-off-by: line to the patch, please respond with it.

    Please add 2.6.26-rc5's 2884f110d5409714f3a04eeb6d2ecd77da66b242
    into it's actually not a serious problem, but it does
    look as if it's a serious problem, so we should stamp it out.


    x86: fix bad pmd ffff810000207xxx(9090909090909090)

    OGAWA Hirofumi and Fede have reported rare pmd_ERROR messages:
    mm/memory.c:127: bad pmd ffff810000207xxx(9090909090909090).

    Initialization's cleanup_highmap was leaving alignment filler
    behind in the pmd for MODULES_VADDR: when vmalloc's guard page
    would occupy a new page table, it's not allocated, and then
    module unload's vfree hits the bad 9090 pmd entry left over.

    Signed-off-by: Hugh Dickins <>
    Signed-off-by: Ingo Molnar <>

    diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
    index 32ba13b..998a06e 100644
    --- a/arch/x86/mm/init_64.c
    +++ b/arch/x86/mm/init_64.c
    @@ -206,7 +206,7 @@ void __init cleanup_highmap(void)
    pmd_t *last_pmd = pmd + PTRS_PER_PMD;

    for (; pmd < last_pmd; pmd++, vaddr += PMD_SIZE) {
    - if (!pmd_present(*pmd))
    + if (pmd_none(*pmd))
    if (vaddr < (unsigned long) _text || vaddr > end)
    set_pmd(pmd, __pmd(0));

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