1 | // SPDX-License-Identifier: GPL-2.0-only |
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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 */ |
8 | unsigned 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 | } |
15 | EXPORT_SYMBOL_GPL(lcm); |
16 | |
17 | unsigned 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 | } |
26 | EXPORT_SYMBOL_GPL(lcm_not_zero); |
27 |