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-rw-r--r--lib/gcd.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/lib/gcd.c b/lib/gcd.c
new file mode 100644
index 000000000..86bdba911
--- /dev/null
+++ b/lib/gcd.c
@@ -0,0 +1,18 @@
+#include <linux/gcd.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;
+}