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    Subject[PATCH] x86: save slit
    Date

    in case we are using fixmap to read it. and that fixmap could be clearred by others.

    Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>

    ---
    arch/x86/mm/srat_64.c | 14 +++++++++++++-
    1 file changed, 13 insertions(+), 1 deletion(-)

    Index: linux-2.6/arch/x86/mm/srat_64.c
    ===================================================================
    --- linux-2.6.orig/arch/x86/mm/srat_64.c
    +++ linux-2.6/arch/x86/mm/srat_64.c
    @@ -100,7 +100,19 @@ static __init inline int srat_disabled(v
    /* Callback for SLIT parsing */
    void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
    {
    - acpi_slit = slit;
    + unsigned length;
    + unsigned long phys;
    +
    + length = slit->header.length;
    + phys = find_e820_area(0, max_pfn_mapped<<PAGE_SHIFT, length,
    + PAGE_SIZE);
    +
    + if (phys == -1L)
    + panic(" Can not save slit!\n");
    +
    + acpi_slit = __va(phys);
    + memcpy(acpi_slit, slit, length);
    + reserve_early(phys, phys + length, "ACPI SLIT");
    }

    /* Callback for Proximity Domain -> LAPIC mapping */

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