cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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seq_lock.c (744B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 *  Do sleep inside a spin-lock
      4 *  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);