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    SubjectRe: [PATCH] x86: traps.c replace #if CONFIG_X86_32 with #ifdef CONFIG_X86_32
    On Tue, 23 Dec 2008 10:20:37 -0800
    "H. Peter Anvin" <hpa@kernel.org> wrote:

    > > --- a/arch/x86/kernel/traps.c
    > > +++ b/arch/x86/kernel/traps.c
    > > @@ -692,7 +692,7 @@ void math_error(void __user *ip)
    > >
    > > err = swd & ~cwd & 0x3f;
    > >
    > > -#if CONFIG_X86_32
    > > +#ifdef CONFIG_X86_32
    > > if (!err)
    > > return;
    > > #endif
    >
    > Applied to tip:x86/fpu, thanks.
    >
    > Andi: you might have a perspective on this: in math_error() we bail out
    > if there is no error on i386, but not on x86-64. I am rather assuming
    > that is because it simply can't happen on x86-64 (no IRQ 13 bullshit) so
    > it wasn't necessary?
    >

    Some 32-bit x86 clones generate math error interrupts when there is no
    actual error.


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