linux-kernel - [PATCH 2/2] lib/lcm.c: lcm(n,0)=lcm(0,n) is 0, not n

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Date:	Tue, 17 Dec 2013 15:46:12 +0100
From:	Rasmus Villemoes <linux@...musvillemoes.dk>
To:	linux-kernel@...r.kernel.org
Cc:	Rasmus Villemoes <linux@...musvillemoes.dk>
Subject: [PATCH 2/2] 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@...musvillemoes.dk>
---
I don't think there is any instance of lcm(0,n) in the kernel, but at
least this reduces code size a little.

 lib/lcm.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/lib/lcm.c b/lib/lcm.c
index 01b3aa9..51cc6b1 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);
-- 
1.8.4.rc3.2.g61bff3f

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