[linux-2.6-block.git] / lib / lcm.c

#include <linux/compiler.h>
#include <linux/gcd.h>
#include <linux/export.h>
#include <linux/lcm.h>

/* Lowest common multiple */
unsigned long lcm(unsigned long a, unsigned long b)
{
	if (a && b)
		return (a / gcd(a, b)) * b;
	else
		return 0;
}
EXPORT_SYMBOL_GPL(lcm);

unsigned long lcm_not_zero(unsigned long a, unsigned long b)
{
	unsigned long l = lcm(a, b);

	if (l)
		return l;

	return (b ? : a);
}
EXPORT_SYMBOL_GPL(lcm_not_zero);
Commit	Line	Data
	1	#include <linux/compiler.h>
	2	#include <linux/gcd.h>
	3	#include <linux/export.h>
	4	#include <linux/lcm.h>
	5
	6	/* Lowest common multiple */
	7	unsigned long lcm(unsigned long a, unsigned long b)
	8	{
	9	if (a && b)
	10	return (a / gcd(a, b)) * b;
	11	else
	12	return 0;
	13	}
	14	EXPORT_SYMBOL_GPL(lcm);
	15
	16	unsigned long lcm_not_zero(unsigned long a, unsigned long b)
	17	{
	18	unsigned long l = lcm(a, b);
	19
	20	if (l)
	21	return l;
	22
	23	return (b ? : a);
	24	}
	25	EXPORT_SYMBOL_GPL(lcm_not_zero);