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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Do sleep inside a spin-lock4 * Copyright (c) 1999 by Takashi Iwai <tiwai@suse.de>5 */6 7#include <linux/export.h>8#include <sound/core.h>9#include "seq_lock.h"10 11/* wait until all locks are released */12void snd_use_lock_sync_helper(snd_use_lock_t *lockp, const char *file, int line)13{14 int warn_count = 5 * HZ;15 16 if (atomic_read(lockp) < 0) {17 pr_warn("ALSA: seq_lock: lock trouble [counter = %d] in %s:%d\n", atomic_read(lockp), file, line);18 return;19 }20 while (atomic_read(lockp) > 0) {21 if (warn_count-- == 0)22 pr_warn("ALSA: seq_lock: waiting [%d left] in %s:%d\n", atomic_read(lockp), file, line);23 schedule_timeout_uninterruptible(1);24 }25}26EXPORT_SYMBOL(snd_use_lock_sync_helper);27