wait.c (cdd38c5f1ce4398ec58fec95904b75824daab7b5) wait.c (11c7aa0ddea8611007768d3e6b58d45dc60a19e1)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Generic waiting primitives.
4 *
5 * (C) 2004 Nadia Yvette Chambers, Oracle
6 */
7#include "sched.h"
8

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259 spin_lock_irqsave(&wq_head->lock, flags);
260 if (list_empty(&wq_entry->entry))
261 __add_wait_queue(wq_head, wq_entry);
262 set_current_state(state);
263 spin_unlock_irqrestore(&wq_head->lock, flags);
264}
265EXPORT_SYMBOL(prepare_to_wait);
266
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Generic waiting primitives.
4 *
5 * (C) 2004 Nadia Yvette Chambers, Oracle
6 */
7#include "sched.h"
8

--- 250 unchanged lines hidden (view full) ---

259 spin_lock_irqsave(&wq_head->lock, flags);
260 if (list_empty(&wq_entry->entry))
261 __add_wait_queue(wq_head, wq_entry);
262 set_current_state(state);
263 spin_unlock_irqrestore(&wq_head->lock, flags);
264}
265EXPORT_SYMBOL(prepare_to_wait);
266
267void
267/* Returns true if we are the first waiter in the queue, false otherwise. */
268bool
268prepare_to_wait_exclusive(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry, int state)
269{
270 unsigned long flags;
269prepare_to_wait_exclusive(struct wait_queue_head *wq_head, struct wait_queue_entry *wq_entry, int state)
270{
271 unsigned long flags;
272 bool was_empty = false;
271
272 wq_entry->flags |= WQ_FLAG_EXCLUSIVE;
273 spin_lock_irqsave(&wq_head->lock, flags);
273
274 wq_entry->flags |= WQ_FLAG_EXCLUSIVE;
275 spin_lock_irqsave(&wq_head->lock, flags);
274 if (list_empty(&wq_entry->entry))
276 if (list_empty(&wq_entry->entry)) {
277 was_empty = list_empty(&wq_head->head);
275 __add_wait_queue_entry_tail(wq_head, wq_entry);
278 __add_wait_queue_entry_tail(wq_head, wq_entry);
279 }
276 set_current_state(state);
277 spin_unlock_irqrestore(&wq_head->lock, flags);
280 set_current_state(state);
281 spin_unlock_irqrestore(&wq_head->lock, flags);
282 return was_empty;
278}
279EXPORT_SYMBOL(prepare_to_wait_exclusive);
280
281void init_wait_entry(struct wait_queue_entry *wq_entry, int flags)
282{
283 wq_entry->flags = flags;
284 wq_entry->private = current;
285 wq_entry->func = autoremove_wake_function;

--- 186 unchanged lines hidden --- 		283}
284EXPORT_SYMBOL(prepare_to_wait_exclusive);
285
286void init_wait_entry(struct wait_queue_entry *wq_entry, int flags)
287{
288 wq_entry->flags = flags;
289 wq_entry->private = current;
290 wq_entry->func = autoremove_wake_function;

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