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-rw-r--r--include/linux/wait.h12
-rw-r--r--kernel/wait.c8
2 files changed, 7 insertions, 13 deletions
diff --git a/include/linux/wait.h b/include/linux/wait.h
index 794be7af58ae..b3b9048421d8 100644
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -77,17 +77,7 @@ struct task_struct;
77#define __WAIT_BIT_KEY_INITIALIZER(word, bit) \ 77#define __WAIT_BIT_KEY_INITIALIZER(word, bit) \
78 { .flags = word, .bit_nr = bit, } 78 { .flags = word, .bit_nr = bit, }
79 79
80/* 80extern void init_waitqueue_head(wait_queue_head_t *q);
81 * lockdep: we want one lock-class for all waitqueue locks.
82 */
83extern struct lock_class_key waitqueue_lock_key;
84
85static inline void init_waitqueue_head(wait_queue_head_t *q)
86{
87 spin_lock_init(&q->lock);
88 lockdep_set_class(&q->lock, &waitqueue_lock_key);
89 INIT_LIST_HEAD(&q->task_list);
90}
91 81
92static inline void init_waitqueue_entry(wait_queue_t *q, struct task_struct *p) 82static inline void init_waitqueue_entry(wait_queue_t *q, struct task_struct *p)
93{ 83{
diff --git a/kernel/wait.c b/kernel/wait.c
index a1d57aeb7f75..59a82f63275d 100644
--- a/kernel/wait.c
+++ b/kernel/wait.c
@@ -10,9 +10,13 @@
10#include <linux/wait.h> 10#include <linux/wait.h>
11#include <linux/hash.h> 11#include <linux/hash.h>
12 12
13struct lock_class_key waitqueue_lock_key; 13void init_waitqueue_head(wait_queue_head_t *q)
14{
15 spin_lock_init(&q->lock);
16 INIT_LIST_HEAD(&q->task_list);
17}
14 18
15EXPORT_SYMBOL(waitqueue_lock_key); 19EXPORT_SYMBOL(init_waitqueue_head);
16 20
17void fastcall add_wait_queue(wait_queue_head_t *q, wait_queue_t *wait) 21void fastcall add_wait_queue(wait_queue_head_t *q, wait_queue_t *wait)
18{ 22{