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