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Date:   Tue, 30 Jul 2019 06:42:51 -0700
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Subject: Re: [PATCH] x86: drop REG_OUT macro from hweight functions
To:     Peter Zijlstra <peterz@infradead.org>,
        Alexey Dobriyan <adobriyan@gmail.com>
CC:     tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org,
        linux-kernel@vger.kernel.org
From:   hpa@zytor.com
Message-ID: <5DF8B85C-57EF-4AE4-A2EE-863D06D7C55E@zytor.com>
Sender: linux-kernel-owner@vger.kernel.org
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On July 30, 2019 1:08:43 AM PDT, Peter Zijlstra <peterz@infradead=2Eorg> wr=
ote:
>On Mon, Jul 29, 2019 at 11:44:17PM +0300, Alexey Dobriyan wrote:
>> On Mon, Jul 29, 2019 at 12:04:47PM +0200, Peter Zijlstra wrote:
>> > +#define _ASM_ARG1B	__ASM_FORM_RAW(dil)
>> > +#define _ASM_ARG2B	__ASM_FORM_RAW(sil)
>> > +#define _ASM_ARG3B	__ASM_FORM_RAW(dl)
>> > +#define _ASM_ARG4B	__ASM_FORM_RAW(cl)
>> > +#define _ASM_ARG5B	__ASM_FORM_RAW(r8b)
>> > +#define _ASM_ARG6B	__ASM_FORM_RAW(r9b)
>>=20
>> I preprocessed percpu code once to see what precisely it does because
>> it was easier than wading through forest of macroes=2E
>
>Per cpu is easy, try reading the tracepoint code ;-)

Sometimes it's the =2Es file one ends up wanting to check out=2E=2E=2E
--=20
Sent from my Android device with K-9 Mail=2E Please excuse my brevity=2E