1// SPDX-License-Identifier: GPL-2.0-only
2#include <linux/compiler.h>
3#include <linux/gcd.h>
4#include <linux/export.h>
5#include <linux/lcm.h>
6
7/* Lowest common multiple */
8unsigned long lcm(unsigned long a, unsigned long b)
9{
10 if (a && b)
11 return (a / gcd(a, b)) * b;
12 else
13 return 0;
14}
15EXPORT_SYMBOL_GPL(lcm);
16
17unsigned long lcm_not_zero(unsigned long a, unsigned long b)
18{
19 unsigned long l = lcm(a, b);
20
21 if (l)
22 return l;
23
24 return (b ? : a);
25}
26EXPORT_SYMBOL_GPL(lcm_not_zero);
27