From: Cyrill Gorcunov <gorcunov@gmail.com>
Date: Thu, 31 Jul 2008 18:52:21 +0000 (+0200)
Subject: x86: idle process - add checking for NULL early param
X-Git-Tag: v2.6.26.2~22
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7cdece1700d9ac159742ee6e4e89a52389818297;p=platform%2Fkernel%2Flinux-stable.git

x86: idle process - add checking for NULL early param

[ Upstream commit ab6bc3e343fbe3be4a0f67225e849d0db6b4b7ac ]

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: akpm@linux-foundation.org
Cc: andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
CC: Oliver Pinter <oliver.pntr@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index ba370dc8685b..58325a6604a4 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -164,6 +164,9 @@ void __cpuinit select_idle_routine(const struct cpuinfo_x86 *c)
 
 static int __init idle_setup(char *str)
 {
+	if (!str)
+		return -EINVAL;
+
 	if (!strcmp(str, "poll")) {
 		printk("using polling idle threads.\n");
 		pm_idle = poll_idle;