From 30e0e178193d4221abc9926b07a4c7661c7cc4a9 Mon Sep 17 00:00:00 2001
From: Li Zefan <lizf@cn.fujitsu.com>
Date: Tue, 13 May 2008 10:27:17 +0800
Subject: cpuset: limit the input of cpuset.sched_relax_domain_level

We allow the inputs to be [-1 ... SD_LV_MAX), and return -EINVAL
for inputs outside this range.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Paul Menage <menage@google.com>
Acked-by: Paul Jackson <pj@sgi.com>
Acked-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 kernel/sched.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'kernel/sched.c')

diff --git a/kernel/sched.c b/kernel/sched.c
index eaf6751e761..bb2c699c9f5 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -6877,7 +6877,12 @@ static int default_relax_domain_level = -1;
 
 static int __init setup_relax_domain_level(char *str)
 {
-	default_relax_domain_level = simple_strtoul(str, NULL, 0);
+	unsigned long val;
+
+	val = simple_strtoul(str, NULL, 0);
+	if (val < SD_LV_MAX)
+		default_relax_domain_level = val;
+
 	return 1;
 }
 __setup("relax_domain_level=", setup_relax_domain_level);
-- 
cgit