158 	struct nfs_page *head = req->wb_head;  in nfs_page_group_lock_head()
297 	if (ret || req->wb_head == req)  in nfs_page_group_lock()
299 	return nfs_page_set_headlock(req->wb_head);  in nfs_page_group_lock()
309 	if (req != req->wb_head)  in nfs_page_group_unlock()
310 		nfs_page_clear_headlock(req->wb_head);  in nfs_page_group_unlock()
322 	struct nfs_page *head = req->wb_head;  in nfs_page_group_sync_on_bit_locked()
376 		req->wb_head = req;  in nfs_page_group_init()
380 		WARN_ON_ONCE(prev->wb_this_page != prev->wb_head);  in nfs_page_group_init()
381 		WARN_ON_ONCE(!test_bit(PG_HEADLOCK, &prev->wb_head->wb_flags));  in nfs_page_group_init()
382 		req->wb_head = prev->wb_head;  in nfs_page_group_init()
388 		kref_get(&req->wb_head->wb_kref);  in nfs_page_group_init()
393 		if (test_bit(PG_INODE_REF, &prev->wb_head->wb_flags)) {  in nfs_page_group_init()
413 	struct nfs_page *head = req->wb_head;  in nfs_page_group_destroy()
424 		tmp->wb_head = tmp;  in nfs_page_group_destroy()
509 		for (last = req->wb_head;  in nfs_create_subreq()
510 		     last->wb_this_page != req->wb_head;  in nfs_create_subreq()