lib: add lib/gcd.c

[cascardo/linux.git] / lib / gcd.c

diff --git a/lib/gcd.c b/lib/gcd.c
new file mode 100644 (file)
index 0000000..f879033
--- /dev/null
+++ b/lib/gcd.c
@@ -0,0 +1,18 @@
+#include <linux/kernel.h>
+#include <linux/gcd.h>
+#include <linux/module.h>
+
+/* Greatest common divisor */
+unsigned long gcd(unsigned long a, unsigned long b)
+{
+       unsigned long r;
+
+       if (a < b)
+               swap(a, b);
+       while ((r = a % b) != 0) {
+               a = b;
+               b = r;
+       }
+       return b;
+}
+EXPORT_SYMBOL_GPL(gcd);