linux/lib/gcd.c
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   1#include <linux/kernel.h>
   2#include <linux/gcd.h>
   3#include <linux/export.h>
   4
   5/* Greatest common divisor */
   6unsigned 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}
  21EXPORT_SYMBOL_GPL(gcd);
  22
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