27 строки
744 B
C
27 строки
744 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Do sleep inside a spin-lock
|
|
* Copyright (c) 1999 by Takashi Iwai <tiwai@suse.de>
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <sound/core.h>
|
|
#include "seq_lock.h"
|
|
|
|
/* wait until all locks are released */
|
|
void snd_use_lock_sync_helper(snd_use_lock_t *lockp, const char *file, int line)
|
|
{
|
|
int warn_count = 5 * HZ;
|
|
|
|
if (atomic_read(lockp) < 0) {
|
|
pr_warn("ALSA: seq_lock: lock trouble [counter = %d] in %s:%d\n", atomic_read(lockp), file, line);
|
|
return;
|
|
}
|
|
while (atomic_read(lockp) > 0) {
|
|
if (warn_count-- == 0)
|
|
pr_warn("ALSA: seq_lock: waiting [%d left] in %s:%d\n", atomic_read(lockp), file, line);
|
|
schedule_timeout_uninterruptible(1);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(snd_use_lock_sync_helper);
|