Re: [PATCH] x86_64: ia32_signal.c: use macro instead of immediate

From: Hiroshi Shimamoto
Date: Mon Jul 14 2008 - 18:26:48 EST


H. Peter Anvin wrote:
> Hiroshi Shimamoto wrote:
>> H. Peter Anvin wrote:
>>> Hiroshi Shimamoto wrote:
>>>> From: Hiroshi Shimamoto <h-shimamoto@xxxxxxxxxxxxx>
>>>>
>>>> Make and use macro FIX_EFLAGS, instead of immediate value 0x40DD5 in
>>>> ia32_restore_sigcontext().
>>>>
>>>> +
>>>> +#ifdef CONFIG_X86_32
>>>> +# define FIX_EFLAGS (__FIX_EFLAGS | X86_EFLAGS_RF)
>>>> +#else
>>>> +# define FIX_EFLAGS __FIX_EFLAGS
>>>> +#endif
>>>> +
>>> Where did this come from? First of all, this is in a 64-bit-only file,
>>> so CONFIG_X86_32 will never be set; second of all, it seems a bit fishy
>>> that these should be different.
>> It came from arch/x86/kernel/signal_64.c. (And signal_32.c has the same one.)
>> And yes, CONFIG_X86_32 is not set, I compiled and compare the results,
>> the macro was replaced by 0x40dd5, no RF.
>> I guess, someone made it same on signal_32.c and signal_64.c.
>>
>
> Yes, it's working toward unification (and ia32signal.c is obviously also
> a candidate for unification.) However, please make that a separate patch.

OK. Will do.

Thanks,
Hiroshi Shimamoto

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