Re: [PATCH 2/5] bitops: compile time optimization for hweight_long(CONSTANT)

From: Michal Marek
Date: Wed Feb 17 2010 - 08:58:04 EST


On 12.2.2010 20:05, H. Peter Anvin wrote:
> On 02/12/2010 09:47 AM, Borislav Petkov wrote:
>>
>> However, this is generic code and for the above to work we have to
>> enforce x86-specific CFLAGS for it. What is the preferred way to do
>> that?
>>
>
> That's a question for Michal and the kbuild list. Michal?

(I was offline last week).

The _preferred_ way probably is not to do it :), but otherwise you can
set CFLAGS_hweight.o depending on CONFIG_X86(_32|_64), just like you do
in arch/x86/lib/Makefile already.

Michal
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