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    Subject[RFC PATCH 9/11] x86, efi: Cleanup PCD bit manipulation in EFI
    Date
    This patch cleans up the PCD bit manipulation in EFI virtual mapping,
    and uses _PAGE_CACHE_<type> macros, instead. This keeps the efi code
    independent from the PAT slot assignment.

    Signed-off-by: Toshi Kani <toshi.kani@hp.com>
    ---
    arch/x86/platform/efi/efi_64.c | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c
    index 290d397..55c6e77 100644
    --- a/arch/x86/platform/efi/efi_64.c
    +++ b/arch/x86/platform/efi/efi_64.c
    @@ -202,10 +202,10 @@ void efi_cleanup_page_tables(unsigned long pa_memmap, unsigned num_pages)
    static void __init __map_region(efi_memory_desc_t *md, u64 va)
    {
    pgd_t *pgd = (pgd_t *)__va(real_mode_header->trampoline_pgd);
    - unsigned long pf = 0;
    + unsigned long pf = _PAGE_CACHE_WB;

    if (!(md->attribute & EFI_MEMORY_WB))
    - pf |= _PAGE_PCD;
    + pf = _PAGE_CACHE_UC_MINUS;

    if (kernel_map_pages_in_pgd(pgd, md->phys_addr, va, md->num_pages, pf))
    pr_warn("Error mapping PA 0x%llx -> VA 0x%llx!\n",

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