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| 2 | |
| 3 | * Do sleep inside a spin-lock
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| 4 | * Copyright (c) 1999 by Takashi Iwai <[email protected]>
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| 5 |
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| 6 |
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| 7 | #include <linux/export.h>
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| 8 | #include <sound/core.h>
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| 9 | #include "seq_lock.h"
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| 10 |
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| 11 |
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| 12 | void snd_use_lock_sync_helper(snd_use_lock_t *lockp, const char *file, int line)
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| 13 | {
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| 14 | int warn_count = 5 * HZ;
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| 15 |
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| 16 | if (atomic_read(lockp) < 0) {
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| 17 | pr_warn("ALSA: seq_lock: lock trouble [counter = %d] in %s:%d\n", atomic_read(lockp), file, line);
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| 18 | return;
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| 19 | }
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| 20 | while (atomic_read(lockp) > 0) {
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| 21 | if (warn_count-- == 0)
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| 22 | pr_warn("ALSA: seq_lock: waiting [%d left] in %s:%d\n", atomic_read(lockp), file, line);
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| 23 | schedule_timeout_uninterruptible(1);
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| 24 | }
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| 25 | }
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| 26 | EXPORT_SYMBOL(snd_use_lock_sync_helper);
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