From 06819f09fe14bbcce2949499e0e100308d362ac9 Mon Sep 17 00:00:00 2001
From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Thu, 12 Jun 2008 16:43:07 +0800
Subject: [PATCH] --- yaml --- r: 98031 b: refs/heads/master c:
 7a232e0350940d2664f4de5cc3f0f443bae5062d h: refs/heads/master i:   98029:
 a2de652b90397b722dfb435d9241396423eb5b18   98027:
 e7755f65b2ce5ed6ab7fa859c715f55a1807d62a   98023:
 f42e7e5e3cda70cb0dc307f2c2d628caa4cfe81a   98015:
 d5a0bb7128b548321e48238c6a4adcccd6d3dc30 v: v3

---
 [refs]               | 2 +-
 trunk/kernel/sched.c | 9 +++++++--
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/[refs] b/[refs]
index 6149f6dc4b6c..534ccd9403e4 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 2e084786f6fe052274f1dfa7c675fe4a02cacd6e
+refs/heads/master: 7a232e0350940d2664f4de5cc3f0f443bae5062d
diff --git a/trunk/kernel/sched.c b/trunk/kernel/sched.c
index 6c1ecbdc0db9..eaf6751e7612 100644
--- a/trunk/kernel/sched.c
+++ b/trunk/kernel/sched.c
@@ -1340,8 +1340,13 @@ calc_delta_mine(unsigned long delta_exec, unsigned long weight,
 {
 	u64 tmp;
 
-	if (!lw->inv_weight)
-		lw->inv_weight = 1 + (WMULT_CONST-lw->weight/2)/(lw->weight+1);
+	if (!lw->inv_weight) {
+		if (BITS_PER_LONG > 32 && unlikely(lw->weight >= WMULT_CONST))
+			lw->inv_weight = 1;
+		else
+			lw->inv_weight = 1 + (WMULT_CONST-lw->weight/2)
+				/ (lw->weight+1);
+	}
 
 	tmp = (u64)delta_exec * weight;
 	/*