diff options
Diffstat (limited to 'include/linux/wait.h')
| -rw-r--r-- | include/linux/wait.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/wait.h b/include/linux/wait.h index bc4f389c49b..794be7af58a 100644 --- a/include/linux/wait.h +++ b/include/linux/wait.h @@ -77,9 +77,15 @@ 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); } |