linux-kernel - Re: [PATCH 1/9] kernel: export sound/core/pcm

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Message-ID: <10f740e80906020015t2d63fdadmaa1fa6bc204ec33a@mail.gmail.com>
Date:	Tue, 2 Jun 2009 09:15:29 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Florian Fainelli <florian@...nwrt.org>,
	linux-kernel@...r.kernel.org, Takashi Iwai <tiwai@...e.de>,
	linux-mips@...ux-mips.org, Ralf Baechle <ralf@...ux-mips.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH 1/9] kernel: export sound/core/pcm_timer.c gcd 
	implementation

On Tue, Jun 2, 2009 at 06:50, Andrew Morton <akpm@...ux-foundation.org> wrote:
> On Mon, 1 Jun 2009 13:57:09 +0200 Florian Fainelli <florian@...nwrt.org> wrote:
>
>> This patch exports the gcd implementation from
>> sound/core/pcm_timer.c into include/linux/kernel.h.
>> AR7 uses it in its clock routines.
>>
>> ...
>>
>> diff --git a/include/linux/kernel.h b/include/linux/kernel.h
>> index 883cd44..878a27a 100644
>> --- a/include/linux/kernel.h
>> +++ b/include/linux/kernel.h
>> @@ -147,6 +147,22 @@ extern int _cond_resched(void);
>>               (__x < 0) ? -__x : __x;         \
>>       })
>>
>> +/* Greatest common divisor */
>> +static inline unsigned long gcd(unsigned long a, unsigned long b)
>> +{
>> +        unsigned long r;
>> +        if (a < b) {
>> +                r = a;
>> +                a = b;
>> +                b = r;
>> +        }
>> +        while ((r = a % b) != 0) {
>> +                a = b;
>> +                b = r;
>> +        }
>> +        return b;
>> +}
>
> a) the name's a bit sucky.   Is there some convention for this name?

Well, `gcd' is a quite common acronym, probably almost as well known as `min'
and `max'...

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds
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