Commit | Line | Data |
---|---|---|
457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
6016daed | 2 | #include <linux/compiler.h> |
2cda2728 | 3 | #include <linux/gcd.h> |
8bc3bcc9 | 4 | #include <linux/export.h> |
72d39508 | 5 | #include <linux/lcm.h> |
2cda2728 MP |
6 | |
7 | /* Lowest common multiple */ | |
8 | unsigned long lcm(unsigned long a, unsigned long b) | |
9 | { | |
10 | if (a && b) | |
74a5fef7 | 11 | return (a / gcd(a, b)) * b; |
69c953c8 RV |
12 | else |
13 | return 0; | |
2cda2728 MP |
14 | } |
15 | EXPORT_SYMBOL_GPL(lcm); | |
e9637415 MS |
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); |