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>
git-mirror · Jul 9, 2008 · 4d8cc87 · 4d8cc87
1 parent d6cd7ef
commit 4d8cc87
Showing 1 changed file with 2 additions and 1 deletion.
diff --git 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);