[PATCH] lockdep: annotate DECLARE_WAIT_QUEUE_HEAD

[powerpc.git] / include / linux / wait.h

diff --git a/include/linux/wait.h b/include/linux/wait.h
index 794be7a..e820d00 100644 (file)
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -77,17 +77,16 @@ struct task_struct;
 #define __WAIT_BIT_KEY_INITIALIZER(word, bit)                          \
        { .flags = word, .bit_nr = bit, }
 
-/*
- * lockdep: we want one lock-class for all waitqueue locks.
- */
-extern struct lock_class_key waitqueue_lock_key;
-
-static inline void init_waitqueue_head(wait_queue_head_t *q)
-{
-       spin_lock_init(&q->lock);
-       lockdep_set_class(&q->lock, &waitqueue_lock_key);
-       INIT_LIST_HEAD(&q->task_list);
-}
+extern void init_waitqueue_head(wait_queue_head_t *q);
+
+#ifdef CONFIG_LOCKDEP
+# define __WAIT_QUEUE_HEAD_INIT_ONSTACK(name) \
+       ({ init_waitqueue_head(&name); name; })
+# define DECLARE_WAIT_QUEUE_HEAD_ONSTACK(name) \
+       wait_queue_head_t name = __WAIT_QUEUE_HEAD_INIT_ONSTACK(name)
+#else
+# define DECLARE_WAIT_QUEUE_HEAD_ONSTACK(name) DECLARE_WAIT_QUEUE_HEAD(name)
+#endif
 
 static inline void init_waitqueue_entry(wait_queue_t *q, struct task_struct *p)
 {