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    Subject[PATCH] Use global TLB flushes in MTRR code
    [probably stable material too]

    Use global TLB flushes in MTRR code

    Obviously kernel mappings should be flushed here too.

    Signed-off-by: Andi Kleen <ak@suse.de>

    ---
    arch/x86/kernel/cpu/mtrr/generic.c | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    Index: linux/arch/x86/kernel/cpu/mtrr/generic.c
    ===================================================================
    --- linux.orig/arch/x86/kernel/cpu/mtrr/generic.c
    +++ linux/arch/x86/kernel/cpu/mtrr/generic.c
    @@ -356,7 +356,7 @@ static void prepare_set(void) __acquires
    }

    /* Flush all TLBs via a mov %cr3, %reg; mov %reg, %cr3 */
    - __flush_tlb();
    + __flush_tlb_all();

    /* Save MTRR state */
    rdmsr(MTRRdefType_MSR, deftype_lo, deftype_hi);
    @@ -368,7 +368,7 @@ static void prepare_set(void) __acquires
    static void post_set(void) __releases(set_atomicity_lock)
    {
    /* Flush TLBs (no need to flush caches - they are disabled) */
    - __flush_tlb();
    + __flush_tlb_all();

    /* Intel (P6) standard MTRRs */
    mtrr_wrmsr(MTRRdefType_MSR, deftype_lo, deftype_hi);

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