237 #define TASK_TOMBSTONE ((void *)-1L)  macro
241 	return READ_ONCE(event->owner) == TASK_TOMBSTONE;  in is_kernel_event()
351 	if (task == TASK_TOMBSTONE)  in event_function_call()
366 	if (task == TASK_TOMBSTONE)  in event_function_call()
393 		if (task == TASK_TOMBSTONE)  in event_function_local()
402 	if (task == TASK_TOMBSTONE)  in event_function_local()
1388 		if (ctx->task && ctx->task != TASK_TOMBSTONE)  in put_ctx()
1393 		if (ctx->task == TASK_TOMBSTONE)  in put_ctx()
1605 		if (ctx->task == TASK_TOMBSTONE ||  in perf_lock_task_context()
3150 		if (ctx->task == TASK_TOMBSTONE) {  in perf_install_in_context()
3167 	if (WARN_ON_ONCE(task == TASK_TOMBSTONE))  in perf_install_in_context()
3207 	if (WARN_ON_ONCE(task == TASK_TOMBSTONE)) {  in perf_install_in_context()
11844 	if (task == TASK_TOMBSTONE)  in perf_event_addr_filters_apply()
13980 	if (ctx->task == TASK_TOMBSTONE) {  in SYSCALL_DEFINE5()
14247 	event->owner = TASK_TOMBSTONE;  in perf_event_create_kernel_counter()
14264 	if (ctx->task == TASK_TOMBSTONE) {  in perf_event_create_kernel_counter()
14432 		if (task && task != TASK_TOMBSTONE)  in sync_child_event()
14551 	WRITE_ONCE(ctx->task, TASK_TOMBSTONE);  in perf_event_exit_task_context()