blob: 03d7fcb420b5d60c564ad10935011ed8a6556b69
| 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); |
| 26 |