summaryrefslogtreecommitdiffstats
path: root/kernel/sched
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/sched')
-rw-r--r--kernel/sched/wait.c154
1 files changed, 77 insertions, 77 deletions
diff --git a/kernel/sched/wait.c b/kernel/sched/wait.c
index c37b3140763e..203aeea96f16 100644
--- a/kernel/sched/wait.c
+++ b/kernel/sched/wait.c
@@ -12,44 +12,44 @@
#include <linux/hash.h>
#include <linux/kthread.h>
-void __init_waitqueue_head(wait_queue_head_t *q, const char *name, struct lock_class_key *key)
+void __init_waitqueue_head(struct wait_queue_head *wq_head, const char *name, struct lock_class_key *key)
{
- spin_lock_init(&q->lock);
- lockdep_set_class_and_name(&q->lock, key, name);
- INIT_LIST_HEAD(&q->task_list);
+ spin_lock_init(&wq_head->lock);
+ lockdep_set_class_and_name(&wq_head->lock, key, name);
+ INIT_LIST_HEAD(&wq_head->task_list);
}
EXPORT_SYMBOL(__init_waitqueue_head);
-void add_wait_queue(wait_queue_head_t *q, struct wait_queue_entry *wq_entry)
+void add_wait_queue(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry)
{
unsigned long flags;
wq_entry->flags &= ~WQ_FLAG_EXCLUSIVE;
- spin_lock_irqsave(&q->lock, flags);
- __add_wait_queue_entry_tail(q, wq_entry);
- spin_unlock_irqrestore(&q->lock, flags);
+ spin_lock_irqsave(&wq_head->lock, flags);
+ __add_wait_queue_entry_tail(wq_head, wq_entry);
+ spin_unlock_irqrestore(&wq_head->lock, flags);
}
EXPORT_SYMBOL(add_wait_queue);
-void add_wait_queue_exclusive(wait_queue_head_t *q, struct wait_queue_entry *wq_entry)
+void add_wait_queue_exclusive(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry)
{
unsigned long flags;
wq_entry->flags |= WQ_FLAG_EXCLUSIVE;
- spin_lock_irqsave(&q->lock, flags);
- __add_wait_queue_entry_tail(q, wq_entry);
- spin_unlock_irqrestore(&q->lock, flags);
+ spin_lock_irqsave(&wq_head->lock, flags);
+ __add_wait_queue_entry_tail(wq_head, wq_entry);
+ spin_unlock_irqrestore(&wq_head->lock, flags);
}
EXPORT_SYMBOL(add_wait_queue_exclusive);
-void remove_wait_queue(wait_queue_head_t *q, struct wait_queue_entry *wq_entry)
+void remove_wait_queue(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry)
{
unsigned long flags;
- spin_lock_irqsave(&q->lock, flags);
- __remove_wait_queue(q, wq_entry);
- spin_unlock_irqrestore(&q->lock, flags);
+ spin_lock_irqsave(&wq_head->lock, flags);
+ __remove_wait_queue(wq_head, wq_entry);
+ spin_unlock_irqrestore(&wq_head->lock, flags);
}
EXPORT_SYMBOL(remove_wait_queue);
@@ -63,12 +63,12 @@ EXPORT_SYMBOL(remove_wait_queue);
* started to run but is not in state TASK_RUNNING. try_to_wake_up() returns
* zero in this (rare) case, and we handle it by continuing to scan the queue.
*/
-static void __wake_up_common(wait_queue_head_t *q, unsigned int mode,
+static void __wake_up_common(struct wait_queue_head *wq_head, unsigned int mode,
int nr_exclusive, int wake_flags, void *key)
{
wait_queue_entry_t *curr, *next;
- list_for_each_entry_safe(curr, next, &q->task_list, task_list) {
+ list_for_each_entry_safe(curr, next, &wq_head->task_list, task_list) {
unsigned flags = curr->flags;
if (curr->func(curr, mode, wake_flags, key) &&
@@ -79,7 +79,7 @@ static void __wake_up_common(wait_queue_head_t *q, unsigned int mode,
/**
* __wake_up - wake up threads blocked on a waitqueue.
- * @q: the waitqueue
+ * @wq_head: the waitqueue
* @mode: which threads
* @nr_exclusive: how many wake-one or wake-many threads to wake up
* @key: is directly passed to the wakeup function
@@ -87,35 +87,35 @@ static void __wake_up_common(wait_queue_head_t *q, unsigned int mode,
* It may be assumed that this function implies a write memory barrier before
* changing the task state if and only if any tasks are woken up.
*/
-void __wake_up(wait_queue_head_t *q, unsigned int mode,
+void __wake_up(struct wait_queue_head *wq_head, unsigned int mode,
int nr_exclusive, void *key)
{
unsigned long flags;
- spin_lock_irqsave(&q->lock, flags);
- __wake_up_common(q, mode, nr_exclusive, 0, key);
- spin_unlock_irqrestore(&q->lock, flags);
+ spin_lock_irqsave(&wq_head->lock, flags);
+ __wake_up_common(wq_head, mode, nr_exclusive, 0, key);
+ spin_unlock_irqrestore(&wq_head->lock, flags);
}
EXPORT_SYMBOL(__wake_up);
/*
* Same as __wake_up but called with the spinlock in wait_queue_head_t held.
*/
-void __wake_up_locked(wait_queue_head_t *q, unsigned int mode, int nr)
+void __wake_up_locked(struct wait_queue_head *wq_head, unsigned int mode, int nr)
{
- __wake_up_common(q, mode, nr, 0, NULL);
+ __wake_up_common(wq_head, mode, nr, 0, NULL);
}
EXPORT_SYMBOL_GPL(__wake_up_locked);
-void __wake_up_locked_key(wait_queue_head_t *q, unsigned int mode, void *key)
+void __wake_up_locked_key(struct wait_queue_head *wq_head, unsigned int mode, void *key)
{
- __wake_up_common(q, mode, 1, 0, key);
+ __wake_up_common(wq_head, mode, 1, 0, key);
}
EXPORT_SYMBOL_GPL(__wake_up_locked_key);
/**
* __wake_up_sync_key - wake up threads blocked on a waitqueue.
- * @q: the waitqueue
+ * @wq_head: the waitqueue
* @mode: which threads
* @nr_exclusive: how many wake-one or wake-many threads to wake up
* @key: opaque value to be passed to wakeup targets
@@ -130,30 +130,30 @@ EXPORT_SYMBOL_GPL(__wake_up_locked_key);
* It may be assumed that this function implies a write memory barrier before
* changing the task state if and only if any tasks are woken up.
*/
-void __wake_up_sync_key(wait_queue_head_t *q, unsigned int mode,
+void __wake_up_sync_key(struct wait_queue_head *wq_head, unsigned int mode,
int nr_exclusive, void *key)
{
unsigned long flags;
int wake_flags = 1; /* XXX WF_SYNC */
- if (unlikely(!q))
+ if (unlikely(!wq_head))
return;
if (unlikely(nr_exclusive != 1))
wake_flags = 0;
- spin_lock_irqsave(&q->lock, flags);
- __wake_up_common(q, mode, nr_exclusive, wake_flags, key);
- spin_unlock_irqrestore(&q->lock, flags);
+ spin_lock_irqsave(&wq_head->lock, flags);
+ __wake_up_common(wq_head, mode, nr_exclusive, wake_flags, key);
+ spin_unlock_irqrestore(&wq_head->lock, flags);
}
EXPORT_SYMBOL_GPL(__wake_up_sync_key);
/*
* __wake_up_sync - see __wake_up_sync_key()
*/
-void __wake_up_sync(wait_queue_head_t *q, unsigned int mode, int nr_exclusive)
+void __wake_up_sync(struct wait_queue_head *wq_head, unsigned int mode, int nr_exclusive)
{
- __wake_up_sync_key(q, mode, nr_exclusive, NULL);
+ __wake_up_sync_key(wq_head, mode, nr_exclusive, NULL);
}
EXPORT_SYMBOL_GPL(__wake_up_sync); /* For internal use only */
@@ -170,30 +170,30 @@ EXPORT_SYMBOL_GPL(__wake_up_sync); /* For internal use only */
* loads to move into the critical region).
*/
void
-prepare_to_wait(wait_queue_head_t *q, struct wait_queue_entry *wq_entry, int state)
+prepare_to_wait(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry, int state)
{
unsigned long flags;
wq_entry->flags &= ~WQ_FLAG_EXCLUSIVE;
- spin_lock_irqsave(&q->lock, flags);
+ spin_lock_irqsave(&wq_head->lock, flags);
if (list_empty(&wq_entry->task_list))
- __add_wait_queue(q, wq_entry);
+ __add_wait_queue(wq_head, wq_entry);
set_current_state(state);
- spin_unlock_irqrestore(&q->lock, flags);
+ spin_unlock_irqrestore(&wq_head->lock, flags);
}
EXPORT_SYMBOL(prepare_to_wait);
void
-prepare_to_wait_exclusive(wait_queue_head_t *q, struct wait_queue_entry *wq_entry, int state)
+prepare_to_wait_exclusive(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry, int state)
{
unsigned long flags;
wq_entry->flags |= WQ_FLAG_EXCLUSIVE;
- spin_lock_irqsave(&q->lock, flags);
+ spin_lock_irqsave(&wq_head->lock, flags);
if (list_empty(&wq_entry->task_list))
- __add_wait_queue_entry_tail(q, wq_entry);
+ __add_wait_queue_entry_tail(wq_head, wq_entry);
set_current_state(state);
- spin_unlock_irqrestore(&q->lock, flags);
+ spin_unlock_irqrestore(&wq_head->lock, flags);
}
EXPORT_SYMBOL(prepare_to_wait_exclusive);
@@ -206,12 +206,12 @@ void init_wait_entry(struct wait_queue_entry *wq_entry, int flags)
}
EXPORT_SYMBOL(init_wait_entry);
-long prepare_to_wait_event(wait_queue_head_t *q, struct wait_queue_entry *wq_entry, int state)
+long prepare_to_wait_event(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry, int state)
{
unsigned long flags;
long ret = 0;
- spin_lock_irqsave(&q->lock, flags);
+ spin_lock_irqsave(&wq_head->lock, flags);
if (unlikely(signal_pending_state(state, current))) {
/*
* Exclusive waiter must not fail if it was selected by wakeup,
@@ -219,7 +219,7 @@ long prepare_to_wait_event(wait_queue_head_t *q, struct wait_queue_entry *wq_ent
*
* The caller will recheck the condition and return success if
* we were already woken up, we can not miss the event because
- * wakeup locks/unlocks the same q->lock.
+ * wakeup locks/unlocks the same wq_head->lock.
*
* But we need to ensure that set-condition + wakeup after that
* can't see us, it should wake up another exclusive waiter if
@@ -230,13 +230,13 @@ long prepare_to_wait_event(wait_queue_head_t *q, struct wait_queue_entry *wq_ent
} else {
if (list_empty(&wq_entry->task_list)) {
if (wq_entry->flags & WQ_FLAG_EXCLUSIVE)
- __add_wait_queue_entry_tail(q, wq_entry);
+ __add_wait_queue_entry_tail(wq_head, wq_entry);
else
- __add_wait_queue(q, wq_entry);
+ __add_wait_queue(wq_head, wq_entry);
}
set_current_state(state);
}
- spin_unlock_irqrestore(&q->lock, flags);
+ spin_unlock_irqrestore(&wq_head->lock, flags);
return ret;
}
@@ -283,14 +283,14 @@ EXPORT_SYMBOL(do_wait_intr_irq);
/**
* finish_wait - clean up after waiting in a queue
- * @q: waitqueue waited on
+ * @wq_head: waitqueue waited on
* @wq_entry: wait descriptor
*
* Sets current thread back to running state and removes
* the wait descriptor from the given waitqueue if still
* queued.
*/
-void finish_wait(wait_queue_head_t *q, struct wait_queue_entry *wq_entry)
+void finish_wait(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry)
{
unsigned long flags;
@@ -309,9 +309,9 @@ void finish_wait(wait_queue_head_t *q, struct wait_queue_entry *wq_entry)
* the list).
*/
if (!list_empty_careful(&wq_entry->task_list)) {
- spin_lock_irqsave(&q->lock, flags);
+ spin_lock_irqsave(&wq_head->lock, flags);
list_del_init(&wq_entry->task_list);
- spin_unlock_irqrestore(&q->lock, flags);
+ spin_unlock_irqrestore(&wq_head->lock, flags);
}
}
EXPORT_SYMBOL(finish_wait);
@@ -334,7 +334,7 @@ static inline bool is_kthread_should_stop(void)
/*
* DEFINE_WAIT_FUNC(wait, woken_wake_func);
*
- * add_wait_queue(&wq, &wait);
+ * add_wait_queue(&wq_head, &wait);
* for (;;) {
* if (condition)
* break;
@@ -348,7 +348,7 @@ static inline bool is_kthread_should_stop(void)
* smp_mb() // B smp_wmb(); // C
* wq_entry->flags |= WQ_FLAG_WOKEN;
* }
- * remove_wait_queue(&wq, &wait);
+ * remove_wait_queue(&wq_head, &wait);
*
*/
long wait_woken(struct wait_queue_entry *wq_entry, unsigned mode, long timeout)
@@ -412,17 +412,17 @@ EXPORT_SYMBOL(wake_bit_function);
* permitted return codes. Nonzero return codes halt waiting and return.
*/
int __sched
-__wait_on_bit(wait_queue_head_t *wq, struct wait_bit_queue *q,
+__wait_on_bit(struct wait_queue_head *wq_head, struct wait_bit_queue *q,
wait_bit_action_f *action, unsigned mode)
{
int ret = 0;
do {
- prepare_to_wait(wq, &q->wait, mode);
+ prepare_to_wait(wq_head, &q->wait, mode);
if (test_bit(q->key.bit_nr, q->key.flags))
ret = (*action)(&q->key, mode);
} while (test_bit(q->key.bit_nr, q->key.flags) && !ret);
- finish_wait(wq, &q->wait);
+ finish_wait(wq_head, &q->wait);
return ret;
}
EXPORT_SYMBOL(__wait_on_bit);
@@ -430,10 +430,10 @@ EXPORT_SYMBOL(__wait_on_bit);
int __sched out_of_line_wait_on_bit(void *word, int bit,
wait_bit_action_f *action, unsigned mode)
{
- wait_queue_head_t *wq = bit_waitqueue(word, bit);
+ struct wait_queue_head *wq_head = bit_waitqueue(word, bit);
DEFINE_WAIT_BIT(wait, word, bit);
- return __wait_on_bit(wq, &wait, action, mode);
+ return __wait_on_bit(wq_head, &wait, action, mode);
}
EXPORT_SYMBOL(out_of_line_wait_on_bit);
@@ -441,36 +441,36 @@ int __sched out_of_line_wait_on_bit_timeout(
void *word, int bit, wait_bit_action_f *action,
unsigned mode, unsigned long timeout)
{
- wait_queue_head_t *wq = bit_waitqueue(word, bit);
+ struct wait_queue_head *wq_head = bit_waitqueue(word, bit);
DEFINE_WAIT_BIT(wait, word, bit);
wait.key.timeout = jiffies + timeout;
- return __wait_on_bit(wq, &wait, action, mode);
+ return __wait_on_bit(wq_head, &wait, action, mode);
}
EXPORT_SYMBOL_GPL(out_of_line_wait_on_bit_timeout);
int __sched
-__wait_on_bit_lock(wait_queue_head_t *wq, struct wait_bit_queue *q,
+__wait_on_bit_lock(struct wait_queue_head *wq_head, struct wait_bit_queue *q,
wait_bit_action_f *action, unsigned mode)
{
int ret = 0;
for (;;) {
- prepare_to_wait_exclusive(wq, &q->wait, mode);
+ prepare_to_wait_exclusive(wq_head, &q->wait, mode);
if (test_bit(q->key.bit_nr, q->key.flags)) {
ret = action(&q->key, mode);
/*
* See the comment in prepare_to_wait_event().
- * finish_wait() does not necessarily takes wq->lock,
+ * finish_wait() does not necessarily takes wwq_head->lock,
* but test_and_set_bit() implies mb() which pairs with
* smp_mb__after_atomic() before wake_up_page().
*/
if (ret)
- finish_wait(wq, &q->wait);
+ finish_wait(wq_head, &q->wait);
}
if (!test_and_set_bit(q->key.bit_nr, q->key.flags)) {
if (!ret)
- finish_wait(wq, &q->wait);
+ finish_wait(wq_head, &q->wait);
return 0;
} else if (ret) {
return ret;
@@ -482,18 +482,18 @@ EXPORT_SYMBOL(__wait_on_bit_lock);
int __sched out_of_line_wait_on_bit_lock(void *word, int bit,
wait_bit_action_f *action, unsigned mode)
{
- wait_queue_head_t *wq = bit_waitqueue(word, bit);
+ struct wait_queue_head *wq_head = bit_waitqueue(word, bit);
DEFINE_WAIT_BIT(wait, word, bit);
- return __wait_on_bit_lock(wq, &wait, action, mode);
+ return __wait_on_bit_lock(wq_head, &wait, action, mode);
}
EXPORT_SYMBOL(out_of_line_wait_on_bit_lock);
-void __wake_up_bit(wait_queue_head_t *wq, void *word, int bit)
+void __wake_up_bit(struct wait_queue_head *wq_head, void *word, int bit)
{
struct wait_bit_key key = __WAIT_BIT_KEY_INITIALIZER(word, bit);
- if (waitqueue_active(wq))
- __wake_up(wq, TASK_NORMAL, 1, &key);
+ if (waitqueue_active(wq_head))
+ __wake_up(wq_head, TASK_NORMAL, 1, &key);
}
EXPORT_SYMBOL(__wake_up_bit);
@@ -555,20 +555,20 @@ static int wake_atomic_t_function(struct wait_queue_entry *wq_entry, unsigned mo
* return codes halt waiting and return.
*/
static __sched
-int __wait_on_atomic_t(wait_queue_head_t *wq, struct wait_bit_queue *q,
+int __wait_on_atomic_t(struct wait_queue_head *wq_head, struct wait_bit_queue *q,
int (*action)(atomic_t *), unsigned mode)
{
atomic_t *val;
int ret = 0;
do {
- prepare_to_wait(wq, &q->wait, mode);
+ prepare_to_wait(wq_head, &q->wait, mode);
val = q->key.flags;
if (atomic_read(val) == 0)
break;
ret = (*action)(val);
} while (!ret && atomic_read(val) != 0);
- finish_wait(wq, &q->wait);
+ finish_wait(wq_head, &q->wait);
return ret;
}
@@ -586,10 +586,10 @@ int __wait_on_atomic_t(wait_queue_head_t *wq, struct wait_bit_queue *q,
__sched int out_of_line_wait_on_atomic_t(atomic_t *p, int (*action)(atomic_t *),
unsigned mode)
{
- wait_queue_head_t *wq = atomic_t_waitqueue(p);
+ struct wait_queue_head *wq_head = atomic_t_waitqueue(p);
DEFINE_WAIT_ATOMIC_T(wait, p);
- return __wait_on_atomic_t(wq, &wait, action, mode);
+ return __wait_on_atomic_t(wq_head, &wait, action, mode);
}
EXPORT_SYMBOL(out_of_line_wait_on_atomic_t);
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2025-02-01 20:45:32 +0100