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    Subject[patch 1/2] x86: bugfix wbinvd() model check instead of family check
    wbinvd is supported on all CPUs 486 or later. But,
    pageattr.c is checking x86_model >= 4 before wbinvd(), which looks like
    an oversight bug. It was first introduced at one place by changeset
    d7c8f21a8cad0228c7c5ce2bb6dbd95d1ee49d13 and got copied over to second
    place in the same file later.

    Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
    ---
    arch/x86/mm/pageattr.c | 4 ++--
    1 files changed, 2 insertions(+), 2 deletions(-)

    diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
    index 797f9f1..2cc019a 100644
    --- a/arch/x86/mm/pageattr.c
    +++ b/arch/x86/mm/pageattr.c
    @@ -153,7 +153,7 @@ static void __cpa_flush_all(void *arg)
    */
    __flush_tlb_all();

    - if (cache && boot_cpu_data.x86_model >= 4)
    + if (cache && boot_cpu_data.x86 >= 4)
    wbinvd();
    }

    @@ -218,7 +218,7 @@ static void cpa_flush_array(unsigned long *start, int numpages, int cache,

    /* 4M threshold */
    if (numpages >= 1024) {
    - if (boot_cpu_data.x86_model >= 4)
    + if (boot_cpu_data.x86 >= 4)
    wbinvd();
    return;
    }
    --
    1.6.0.6
    --



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