From: Cyrill Gorcunov <gorcunov@gmail.com>
Date: Sat, 5 Jul 2008 11:53:38 +0000 (+0400)
Subject: x86: smpboot maxcpus - add checking for NULL early param
X-Git-Tag: firefly_0821_release~19458^2~8^4~16
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4d8cc874d7ed43eda72765e9c0e141e170fee4f3;p=firefly-linux-kernel-4.4.55.git

x86: smpboot maxcpus - add checking for NULL early param

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>
---

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index fd933b5465b6..e47bfac70c38 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1452,7 +1452,8 @@ static int __init parse_maxcpus(char *arg)
 {
 	extern unsigned int maxcpus;
 
-	maxcpus = simple_strtoul(arg, NULL, 0);
+	if (arg)
+		maxcpus = simple_strtoul(arg, NULL, 0);
 	return 0;
 }
 early_param("maxcpus", parse_maxcpus);