| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 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 */ |
| 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); |