406 		struct nfs_page *subreq = destroy_list;  in nfs_destroy_unlinked_subrequests()  local
408 		destroy_list = (subreq->wb_this_page == old_head) ?  in nfs_destroy_unlinked_subrequests()
409 				   NULL : subreq->wb_this_page;  in nfs_destroy_unlinked_subrequests()
411 		WARN_ON_ONCE(old_head != subreq->wb_head);  in nfs_destroy_unlinked_subrequests()
414 		subreq->wb_this_page = subreq;  in nfs_destroy_unlinked_subrequests()
416 		clear_bit(PG_REMOVE, &subreq->wb_flags);  in nfs_destroy_unlinked_subrequests()
419 		if (!kref_read(&subreq->wb_kref)) {  in nfs_destroy_unlinked_subrequests()
421 			if (test_and_clear_bit(PG_TEARDOWN, &subreq->wb_flags))  in nfs_destroy_unlinked_subrequests()
422 				nfs_free_request(subreq);  in nfs_destroy_unlinked_subrequests()
426 		subreq->wb_head = subreq;  in nfs_destroy_unlinked_subrequests()
428 		if (test_and_clear_bit(PG_INODE_REF, &subreq->wb_flags)) {  in nfs_destroy_unlinked_subrequests()
429 			nfs_release_request(subreq);  in nfs_destroy_unlinked_subrequests()
435 		nfs_unlock_and_release_request(subreq);  in nfs_destroy_unlinked_subrequests()
461 	struct nfs_page *head, *subreq;  in nfs_lock_and_join_requests()  local
497 	for (subreq = head->wb_this_page; subreq != head;  in nfs_lock_and_join_requests()
498 			subreq = subreq->wb_this_page) {  in nfs_lock_and_join_requests()
500 		if (!kref_get_unless_zero(&subreq->wb_kref)) {  in nfs_lock_and_join_requests()
501 			if (subreq->wb_offset == head->wb_offset + total_bytes)  in nfs_lock_and_join_requests()
502 				total_bytes += subreq->wb_bytes;  in nfs_lock_and_join_requests()
506 		while (!nfs_lock_request(subreq)) {  in nfs_lock_and_join_requests()
512 			ret = nfs_wait_on_request(subreq);  in nfs_lock_and_join_requests()
516 				nfs_unroll_locks(inode, head, subreq);  in nfs_lock_and_join_requests()
517 				nfs_release_request(subreq);  in nfs_lock_and_join_requests()
525 		if (subreq->wb_offset == (head->wb_offset + total_bytes)) {  in nfs_lock_and_join_requests()
527 			total_bytes += subreq->wb_bytes;  in nfs_lock_and_join_requests()
528 		} else if (WARN_ON_ONCE(subreq->wb_offset < head->wb_offset ||  in nfs_lock_and_join_requests()
529 			    ((subreq->wb_offset + subreq->wb_bytes) >  in nfs_lock_and_join_requests()
532 			nfs_unroll_locks(inode, head, subreq);  in nfs_lock_and_join_requests()
533 			nfs_unlock_and_release_request(subreq);  in nfs_lock_and_join_requests()
541 	subreq = head;  in nfs_lock_and_join_requests()
543 		nfs_clear_request_commit(subreq);  in nfs_lock_and_join_requests()
544 		subreq = subreq->wb_this_page;  in nfs_lock_and_join_requests()
545 	} while (subreq != head);  in nfs_lock_and_join_requests()