diff -urN linux-2.6.11-rc3-bk7/include/linux/timer.h linux-2.6.11-rc3-bk7-patched/include/linux/timer.h
--- linux-2.6.11-rc3-bk7/include/linux/timer.h	2004-12-24 14:35:23.000000000 -0700
+++ linux-2.6.11-rc3-bk7-patched/include/linux/timer.h	2005-02-11 01:16:39.000000000 -0700
@@ -87,7 +87,7 @@
 	__mod_timer(timer, timer->expires);
 }
 
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT)
   extern int del_timer_sync(struct timer_list *timer);
   extern int del_singleshot_timer_sync(struct timer_list *timer);
 #else
diff -urN linux-2.6.11-rc3-bk7/kernel/timer.c linux-2.6.11-rc3-bk7-patched/kernel/timer.c
--- linux-2.6.11-rc3-bk7/kernel/timer.c	2005-02-11 01:09:38.000000000 -0700
+++ linux-2.6.11-rc3-bk7-patched/kernel/timer.c	2005-02-11 01:16:53.000000000 -0700
@@ -318,7 +318,7 @@
 
 EXPORT_SYMBOL(del_timer);
 
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT)
 /***
  * del_timer_sync - deactivate a timer and wait for the handler to finish.
  * @timer: the timer to be deactivated