first commit

1 files changed, 21 insertions, 0 deletions

diff --git a/lib/gcd.c b/lib/gcd.c
new file mode 100644
index 000000000..3657f129d
--- /dev/null
+++ b/lib/gcd.c
@@ -0,0 +1,21 @@
+#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);