From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- sound/core/seq/seq_lock.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 sound/core/seq/seq_lock.c (limited to 'sound/core/seq/seq_lock.c') 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 + */ + +#include +#include +#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); -- cgit v1.2.3