1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/kthread.h>
3 #include <linux/wait.h>
9 DECLARE_WAIT_QUEUE_HEAD(speakup_event);
10 EXPORT_SYMBOL_GPL(speakup_event);
12 int speakup_thread(void *data)
16 struct bleep our_sound;
20 our_sound.jiffies = 0;
22 mutex_lock(&spk_mutex);
27 spin_lock_irqsave(&speakup_info.spinlock, flags);
28 our_sound = spk_unprocessed_sound;
29 spk_unprocessed_sound.active = 0;
30 prepare_to_wait(&speakup_event, &wait,
32 should_break = kthread_should_stop() ||
34 (synth && synth->catch_up && synth->alive &&
35 (speakup_info.flushing ||
36 !synth_buffer_empty()));
37 spin_unlock_irqrestore(&speakup_info.spinlock, flags);
40 mutex_unlock(&spk_mutex);
42 mutex_lock(&spk_mutex);
44 finish_wait(&speakup_event, &wait);
45 if (kthread_should_stop())
49 kd_mksound(our_sound.freq, our_sound.jiffies);
50 if (synth && synth->catch_up && synth->alive) {
52 * It is up to the callee to take the lock, so that it
53 * can sleep whenever it likes
55 synth->catch_up(synth);
60 mutex_unlock(&spk_mutex);