linux/lib/gcd.c at 1318a481fc37c503a901b96ae06b692ca2b21af5 - mirrors/linux - Nagai Git

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Florian Fainelli d282922461 lib: add lib/gcd.c

This patch adds lib/gcd.c which contains a greatest common divider
implementation taken from sound/core/pcm_timer.c

Several usages of this new library function will be sent to subsystem
maintainers.

[akpm@linux-foundation.org: use swap() (pointed out by Joe)]
[akpm@linux-foundation.org: just add gcd.o to obj-y, remove Kconfig changes]
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Simon Horman <horms@verge.net.au>
Cc: Julius Volz <juliusv@google.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Patrick McHardy <kaber@trash.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2009-06-18 13:04:05 -07:00

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 #include <linux/kernel.h>
 #include <linux/gcd.h>
 #include <linux/module.h>
 /* Greatest common divisor */
 unsigned long gcd(unsigned long a, unsigned long b)
 {
 	unsigned long r;
 	if (a < b)
 		swap(a, b);
 	while ((r = a % b) != 0) {
 		a = b;
 		b = r;
 	}
 	return b;
 }
 EXPORT_SYMBOL_GPL(gcd);