[PATCH] oprofile: backtrace operation does not initialized

Allow stack tracing to work when sampling on timer is forced using the
timer=1 boot option.  Reported by Akinobu Mita.
Signed-off-by: Greg Banks <gnb@melbourne.sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/oprofile/oprof.c

@@ -155,13 +155,11 @@ static int __init oprofile_init(void)
 {
 	int err = 0;
 
-	/* this is our fallback case */
-	oprofile_timer_init(&oprofile_ops);
+	oprofile_arch_init(&oprofile_ops);
 
 	if (timer) {
 		printk(KERN_INFO "oprofile: using timer interrupt.\n");
-	} else {
-		oprofile_arch_init(&oprofile_ops);
+		oprofile_timer_init(&oprofile_ops);
 	}
 
 	err = oprofilefs_register();

drivers/oprofile/timer_int.c

@@ -37,6 +37,9 @@ static void timer_stop(void)
 
 void __init oprofile_timer_init(struct oprofile_operations * ops)
 {
+	ops->create_files = NULL;
+	ops->setup = NULL;
+	ops->shutdown = NULL;
 	ops->start = timer_start;
 	ops->stop = timer_stop;
 	ops->cpu_type = "timer";