gcd.c

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#include <linux/kernel.h>
#include <linux/gcd.h>
#include <linux/export.h>

/* Greatest common divisor */
unsigned long gcd(unsigned long a, unsigned long b)
{
    unsigned long r;

    if (a < b)
        swap(a, b);

    if (!b)
        return a;
    while ((r = a % b) != 0) {
        a = b;
        b = r;
    }
    return b;
}
EXPORT_SYMBOL_GPL(gcd);