1 files changed, 22 insertions, 0 deletions
diff --git a/sound/core/seq/seq_lock.h b/sound/core/seq/seq_lock.h
new file mode 100644
index 000000000..a973860eb
--- /dev/null
+++ b/sound/core/seq/seq_lock.h
@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __SND_SEQ_LOCK_H
+#define __SND_SEQ_LOCK_H
+
+#include <linux/sched.h>
+
+typedef atomic_t snd_use_lock_t;
+
+/* initialize lock */
+#define snd_use_lock_init(lockp) atomic_set(lockp, 0)
+
+/* increment lock */
+#define snd_use_lock_use(lockp) atomic_inc(lockp)
+
+/* release lock */
+#define snd_use_lock_free(lockp) atomic_dec(lockp)
+
+/* wait until all locks are released */
+void snd_use_lock_sync_helper(snd_use_lock_t *lock, const char *file, int line);
+#define snd_use_lock_sync(lockp) snd_use_lock_sync_helper(lockp, __BASE_FILE__, __LINE__)
+
+#endif /* __SND_SEQ_LOCK_H */