--- kernel/kmod.c.orig	2012-03-08 10:26:05.504752023 +0100
+++ kernel/kmod.c	2012-03-08 11:25:05.028661835 +0100
@@ -154,6 +154,15 @@ static int ____call_usermodehelper(void
 	/* We can run anywhere, unlike our parent keventd(). */
 	set_cpus_allowed_ptr(current, cpu_all_mask);
 
+	printk(KERN_EMERG "Unleash the signal...\n");
+
+	/*
+ 	 * (1) here we emulate receiving a signal.
+	 *     In the original case, a signal should be delivered from outside,
+	 *     say, by "kill(-1, SIGKILL)" in busybox.
+	 */
+	send_sig(SIGUSR1, current, 0);
+
 	/*
 	 * Our parent is keventd, which runs with elevated scheduling priority.
 	 * Avoid propagating that into the userspace child.
@@ -181,6 +190,19 @@ static int ____call_usermodehelper(void
 
 	commit_creds(new);
 
+	/* (2) here we emulate the failure of kernel_execve().
+	 *     In real life, the failure can be due to a memory shortage,
+	 *     or something else.
+         *     In our case, it happens when a board reboots - same as (1) above.
+	 */
+	retval = kernel_execve(NULL,
+			       (const char *const *)sub_info->argv,
+			       (const char *const *)sub_info->envp);
+
+	printk(KERN_EMERG "x86 is rock-solid!");
+	flush_signals(current);
+
+	/* If we survived the test, let's continue so the user should not notice. */
 	retval = kernel_execve(sub_info->path,
 			       (const char *const *)sub_info->argv,
 			       (const char *const *)sub_info->envp);