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// 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);
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