lib/gcd.c

   1 #include <linux/kernel.h>
   2 #include <linux/gcd.h>
   3 #include <linux/export.h>
   4
   5 /* Greatest common divisor */
   6 unsigned long gcd(unsigned long a, unsigned long b)
   7 {
   8         unsigned long r;
   9
  10         if (a < b)
  11                 swap(a, b);
  12
  13         if (!b)
  14                 return a;
  15         while ((r = a % b) != 0) {
  16                 a = b;
  17                 b = r;
  18         }
  19         return b;
  20 }
  21 EXPORT_SYMBOL_GPL(gcd);