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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
| commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
| tree | a94efe259b9009378be6d90eb30d2b019d95c194 /sound/core/seq/seq_lock.c | |
| parent | Initial commit. (diff) | |
| download | linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip | |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sound/core/seq/seq_lock.c')
| -rw-r--r-- | sound/core/seq/seq_lock.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/sound/core/seq/seq_lock.c b/sound/core/seq/seq_lock.c new file mode 100644 index 000000000..48b4ffb4b --- /dev/null +++ b/sound/core/seq/seq_lock.c @@ -0,0 +1,26 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Do sleep inside a spin-lock + * Copyright (c) 1999 by Takashi Iwai <tiwai@suse.de> + */ + +#include <linux/export.h> +#include <sound/core.h> +#include "seq_lock.h" + +/* wait until all locks are released */ +void snd_use_lock_sync_helper(snd_use_lock_t *lockp, const char *file, int line) +{ + int warn_count = 5 * HZ; + + if (atomic_read(lockp) < 0) { + pr_warn("ALSA: seq_lock: lock trouble [counter = %d] in %s:%d\n", atomic_read(lockp), file, line); + return; + } + while (atomic_read(lockp) > 0) { + if (warn_count-- == 0) + pr_warn("ALSA: seq_lock: waiting [%d left] in %s:%d\n", atomic_read(lockp), file, line); + schedule_timeout_uninterruptible(1); + } +} +EXPORT_SYMBOL(snd_use_lock_sync_helper); |