[deliverable/linux.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
6016daed	1	#include <linux/compiler.h>
2cda2728	2	#include <linux/gcd.h>
8bc3bcc9	3	#include <linux/export.h>
72d39508	4	#include <linux/lcm.h>
2cda2728 MP	5
	6	/* Lowest common multiple */
	7	unsigned long lcm(unsigned long a, unsigned long b)
	8	{
	9	if (a && b)
74a5fef7	10	return (a / gcd(a, b)) * b;
69c953c8 RV	11	else
69c953c8 RV	12	return 0;
2cda2728 MP	13	}
2cda2728 MP	14	EXPORT_SYMBOL_GPL(lcm);
e9637415 MS	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);