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    SubjectRe: Bug#464962: immediate crash on boot on TM5800
    Thought some more about this, and since this probably means gcc will 
    generate this for userspace code as well nowadays, tm5800 should
    probably be downgraded to a 586-class machine. Hence the Linux policy
    of promoting it to a 686-class machine for having CMOV is actually
    incorrect, it doesn't have all the userspace-visible features of a
    686-class machine, lacking long NOP.

    -hpa

    diff --git a/arch/x86/kernel/cpu/transmeta.c b/arch/x86/kernel/cpu/transmeta.c
    index 200fb3f..e8b422c 100644
    --- a/arch/x86/kernel/cpu/transmeta.c
    +++ b/arch/x86/kernel/cpu/transmeta.c
    @@ -76,13 +76,6 @@ static void __cpuinit init_transmeta(struct cpuinfo_x86 *c)
    /* All Transmeta CPUs have a constant TSC */
    set_bit(X86_FEATURE_CONSTANT_TSC, c->x86_capability);

    - /* If we can run i686 user-space code, call us an i686 */
    -#define USER686 ((1 << X86_FEATURE_TSC)|\
    - (1 << X86_FEATURE_CX8)|\
    - (1 << X86_FEATURE_CMOV))
    - if (c->x86 == 5 && (c->x86_capability[0] & USER686) == USER686)
    - c->x86 = 6;
    -
    #ifdef CONFIG_SYSCTL
    /* randomize_va_space slows us down enormously;
    it probably triggers retranslation of x86->native bytecode */
    \
     
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      Last update: 2008-02-12 22:49    [W:0.058 / U:62.260 seconds]
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