[PATCH] lockdep: annotate hrtimer base locks

Teach special (recursive) locking code to the lock validator.  Has no effect
on non-lockdep kernels.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

kernel/hrtimer.c

diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 8d3dc29..617304c 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -782,8 +782,10 @@
 	struct hrtimer_base *base = per_cpu(hrtimer_bases, cpu);
 	int i;
 
-	for (i = 0; i < MAX_HRTIMER_BASES; i++, base++)
+	for (i = 0; i < MAX_HRTIMER_BASES; i++, base++) {
 		spin_lock_init(&base->lock);
+		lockdep_set_class(&base->lock, &base->lock_key);
+	}
 }
 
 #ifdef CONFIG_HOTPLUG_CPU