* fixup_init is called when:
  * - an active object is initialized
  */
-static int hrtimer_fixup_init(void *addr, enum debug_obj_state state)
+static bool hrtimer_fixup_init(void *addr, enum debug_obj_state state)
 {
        struct hrtimer *timer = addr;
 
        case ODEBUG_STATE_ACTIVE:
                hrtimer_cancel(timer);
                debug_object_init(timer, &hrtimer_debug_descr);
-               return 1;
+               return true;
        default:
-               return 0;
+               return false;
        }
 }
 
  * - an active object is activated
  * - an unknown object is activated (might be a statically initialized object)
  */
-static int hrtimer_fixup_activate(void *addr, enum debug_obj_state state)
+static bool hrtimer_fixup_activate(void *addr, enum debug_obj_state state)
 {
        switch (state) {
 
        case ODEBUG_STATE_NOTAVAILABLE:
                WARN_ON_ONCE(1);
-               return 0;
+               return false;
 
        case ODEBUG_STATE_ACTIVE:
                WARN_ON(1);
 
        default:
-               return 0;
+               return false;
        }
 }
 
  * fixup_free is called when:
  * - an active object is freed
  */
-static int hrtimer_fixup_free(void *addr, enum debug_obj_state state)
+static bool hrtimer_fixup_free(void *addr, enum debug_obj_state state)
 {
        struct hrtimer *timer = addr;
 
        case ODEBUG_STATE_ACTIVE:
                hrtimer_cancel(timer);
                debug_object_free(timer, &hrtimer_debug_descr);
-               return 1;
+               return true;
        default:
-               return 0;
+               return false;
        }
 }
 
 
  * fixup_init is called when:
  * - an active object is initialized
  */
-static int timer_fixup_init(void *addr, enum debug_obj_state state)
+static bool timer_fixup_init(void *addr, enum debug_obj_state state)
 {
        struct timer_list *timer = addr;
 
        case ODEBUG_STATE_ACTIVE:
                del_timer_sync(timer);
                debug_object_init(timer, &timer_debug_descr);
-               return 1;
+               return true;
        default:
-               return 0;
+               return false;
        }
 }
 
  * - an active object is activated
  * - an unknown object is activated (might be a statically initialized object)
  */
-static int timer_fixup_activate(void *addr, enum debug_obj_state state)
+static bool timer_fixup_activate(void *addr, enum debug_obj_state state)
 {
        struct timer_list *timer = addr;
 
                    timer->entry.next == TIMER_ENTRY_STATIC) {
                        debug_object_init(timer, &timer_debug_descr);
                        debug_object_activate(timer, &timer_debug_descr);
-                       return 0;
+                       return false;
                } else {
                        setup_timer(timer, stub_timer, 0);
-                       return 1;
+                       return true;
                }
-               return 0;
+               return false;
 
        case ODEBUG_STATE_ACTIVE:
                WARN_ON(1);
 
        default:
-               return 0;
+               return false;
        }
 }
 
  * fixup_free is called when:
  * - an active object is freed
  */
-static int timer_fixup_free(void *addr, enum debug_obj_state state)
+static bool timer_fixup_free(void *addr, enum debug_obj_state state)
 {
        struct timer_list *timer = addr;
 
        case ODEBUG_STATE_ACTIVE:
                del_timer_sync(timer);
                debug_object_free(timer, &timer_debug_descr);
-               return 1;
+               return true;
        default:
-               return 0;
+               return false;
        }
 }
 
  * fixup_assert_init is called when:
  * - an untracked/uninit-ed object is found
  */
-static int timer_fixup_assert_init(void *addr, enum debug_obj_state state)
+static bool timer_fixup_assert_init(void *addr, enum debug_obj_state state)
 {
        struct timer_list *timer = addr;
 
                         * is tracked in the object tracker.
                         */
                        debug_object_init(timer, &timer_debug_descr);
-                       return 0;
+                       return false;
                } else {
                        setup_timer(timer, stub_timer, 0);
-                       return 1;
+                       return true;
                }
        default:
-               return 0;
+               return false;
        }
 }