1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/md/dm-vdo/thread-registry.h b/drivers/md/dm-vdo/thread-registry.h
new file mode 100644
index 0000000000..cc6d78312b
--- /dev/null
+++ b/drivers/md/dm-vdo/thread-registry.h
@@ -0,0 +1,32 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright 2023 Red Hat
+ */
+
+#ifndef VDO_THREAD_REGISTRY_H
+#define VDO_THREAD_REGISTRY_H
+
+#include <linux/list.h>
+#include <linux/spinlock.h>
+
+struct thread_registry {
+	struct list_head links;
+	spinlock_t lock;
+};
+
+struct registered_thread {
+	struct list_head links;
+	const void *pointer;
+	struct task_struct *task;
+};
+
+void vdo_initialize_thread_registry(struct thread_registry *registry);
+
+void vdo_register_thread(struct thread_registry *registry,
+			 struct registered_thread *new_thread, const void *pointer);
+
+void vdo_unregister_thread(struct thread_registry *registry);
+
+const void *vdo_lookup_thread(struct thread_registry *registry);
+
+#endif /* VDO_THREAD_REGISTRY_H */