[PATCH] Add warning `init=' to init/main.c

I passed init=/mylinuxrc to the kernel on the command line.  The kernel
silently dropped down to exec /sbin/init.  It turned out that /mylinuxrc
had improper permissions.  Without any warning message from the kernel that
something was wrong it took awhile to find the issue.  The patch below adds
a warning.
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

init/main.c

@@ -708,10 +708,11 @@ static int init(void * unused)
 	 * The Bourne shell can be used instead of init if we are 
 	 * trying to recover a really broken machine.
 	 */
-
-	if (execute_command)
+	if (execute_command) {
 		run_init_process(execute_command);
-
+		printk(KERN_WARNING "Failed to execute %s.  Attempting "
+					"defaults...\n", execute_command);
+	}
 	run_init_process("/sbin/init");
 	run_init_process("/etc/init");
 	run_init_process("/bin/init");