111 	struct userfaultfd_wait_queue *uwq;  in userfaultfd_wake_function()  local
114 	uwq = container_of(wq, struct userfaultfd_wait_queue, wq);  in userfaultfd_wake_function()
119 	if (len && (start > uwq->msg.arg.pagefault.address ||  in userfaultfd_wake_function()
120 		    start + len <= uwq->msg.arg.pagefault.address))  in userfaultfd_wake_function()
122 	WRITE_ONCE(uwq->waken, true);  in userfaultfd_wake_function()
356 	struct userfaultfd_wait_queue uwq;  in handle_userfault()  local
458 	init_waitqueue_func_entry(&uwq.wq, userfaultfd_wake_function);  in handle_userfault()
459 	uwq.wq.private = current;  in handle_userfault()
460 	uwq.msg = userfault_msg(vmf->address, vmf->flags, reason,  in handle_userfault()
462 	uwq.ctx = ctx;  in handle_userfault()
463 	uwq.waken = false;  in handle_userfault()
476 	__add_wait_queue(&ctx->fault_pending_wqh, &uwq.wq);  in handle_userfault()
508 		while (!READ_ONCE(uwq.waken)) {  in handle_userfault()
516 			if (READ_ONCE(uwq.waken) ||  in handle_userfault()
564 	if (!list_empty_careful(&uwq.wq.entry)) {  in handle_userfault()
570 		list_del(&uwq.wq.entry);  in handle_userfault()
951 	struct userfaultfd_wait_queue *uwq;  in find_userfault_in()  local
955 	uwq = NULL;  in find_userfault_in()
960 	uwq = container_of(wq, struct userfaultfd_wait_queue, wq);  in find_userfault_in()
962 	return uwq;  in find_userfault_in()
1041 	struct userfaultfd_wait_queue *uwq;  in userfaultfd_ctx_read()  local
1058 		uwq = find_userfault(ctx);  in userfaultfd_ctx_read()
1059 		if (uwq) {  in userfaultfd_ctx_read()
1090 			list_del(&uwq->wq.entry);  in userfaultfd_ctx_read()
1091 			add_wait_queue(&ctx->fault_wqh, &uwq->wq);  in userfaultfd_ctx_read()
1096 			*msg = uwq->msg;  in userfaultfd_ctx_read()
1104 		uwq = find_userfault_evt(ctx);  in userfaultfd_ctx_read()
1105 		if (uwq) {  in userfaultfd_ctx_read()
1106 			*msg = uwq->msg;  in userfaultfd_ctx_read()
1108 			if (uwq->msg.event == UFFD_EVENT_FORK) {  in userfaultfd_ctx_read()
1111 					uwq->msg.arg.reserved.reserved1;  in userfaultfd_ctx_read()
1112 				list_move(&uwq->wq.entry, &fork_event);  in userfaultfd_ctx_read()
1124 			userfaultfd_event_complete(ctx, uwq);  in userfaultfd_ctx_read()
1157 			uwq = list_first_entry(&fork_event,  in userfaultfd_ctx_read()
1158 					       typeof(*uwq),  in userfaultfd_ctx_read()
1170 			list_del(&uwq->wq.entry);  in userfaultfd_ctx_read()
1171 			__add_wait_queue(&ctx->event_wqh, &uwq->wq);  in userfaultfd_ctx_read()
1179 				userfaultfd_event_complete(ctx, uwq);  in userfaultfd_ctx_read()