lib/lcm.c: lcm(n,0)=lcm(0,n) is 0, not n

Return the mathematically correct answer when an argument is 0.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 4 deletions

diff --git a/lib/lcm.c b/lib/lcm.c
index 01b3aa922dda..51cc6b13cd52 100644
--- a/lib/lcm.c
+++ b/lib/lcm.c
@@ -8,9 +8,7 @@ unsigned long lcm(unsigned long a, unsigned long b)
 {
         if (a && b)
                 return (a / gcd(a, b)) * b;
-        else if (b)
-                return b;
-
-        return a;
+        else
+                return 0;
 }
 EXPORT_SYMBOL_GPL(lcm);