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26 lines
744 B
26 lines
744 B
// 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 <[email protected]> |
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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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