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    Subject[PATCH 6 of 8] x86: clarify use of _PAGE_CHG_MASK
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    _PAGE_CHG_MASK is defined as the set of bits not updated by
    pte_modify(); specifically, the pfn itself, and the Accessed and Dirty
    bits (which are updated by hardware).

    Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
    ---
    include/asm-x86/pgtable.h | 9 +++------
    1 file changed, 3 insertions(+), 6 deletions(-)

    diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h
    --- a/include/asm-x86/pgtable.h
    +++ b/include/asm-x86/pgtable.h
    @@ -57,6 +57,7 @@
    #define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | \
    _PAGE_DIRTY)

    +/* Set of bits not changed in pte_modify */
    #define _PAGE_CHG_MASK (PTE_MASK | _PAGE_PCD | _PAGE_PWT | \
    _PAGE_ACCESSED | _PAGE_DIRTY)




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