drivers/md/dm-vdo/thread-device.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2023 Red Hat
   4  */
   5
   6 #include "thread-device.h"
   7
   8 /* A registry of threads associated with device id numbers. */
   9 static struct thread_registry device_id_thread_registry;
  10
  11 /* Any registered thread must be unregistered. */
  12 void vdo_register_thread_device_id(struct registered_thread *new_thread,
  13                                    unsigned int *id_ptr)
  14 {
  15         vdo_register_thread(&device_id_thread_registry, new_thread, id_ptr);
  16 }
  17
  18 void vdo_unregister_thread_device_id(void)
  19 {
  20         vdo_unregister_thread(&device_id_thread_registry);
  21 }
  22
  23 int vdo_get_thread_device_id(void)
  24 {
  25         const unsigned int *pointer;
  26
  27         pointer = vdo_lookup_thread(&device_id_thread_registry);
  28         return (pointer != NULL) ? *pointer : -1;
  29 }
  30
  31 void vdo_initialize_thread_device_registry(void)
  32 {
  33         vdo_initialize_thread_registry(&device_id_thread_registry);
  34 }