x86: idle process - 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 · ab6bc3e · ab6bc3e
1 parent 84e65b0
commit ab6bc3e
Showing 1 changed file with 3 additions and 0 deletions.
diff --git 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;