314 	wb->congested = wb_congested_get_create(bdi, blkcg_id, gfp);  in wb_init()
315 	if (!wb->congested)  in wb_init()
335 	wb_congested_put(wb->congested);  in wb_init()
372 	wb_congested_put(wb->congested);  in wb_exit()
401 	struct bdi_writeback_congested *new_congested = NULL, *congested;  in wb_congested_get_create()  local
412 		congested = container_of(parent, struct bdi_writeback_congested,  in wb_congested_get_create()
414 		if (congested->blkcg_id < blkcg_id)  in wb_congested_get_create()
416 		else if (congested->blkcg_id > blkcg_id)  in wb_congested_get_create()
424 		congested = new_congested;  in wb_congested_get_create()
426 		rb_link_node(&congested->rb_node, parent, node);  in wb_congested_get_create()
427 		rb_insert_color(&congested->rb_node, &bdi->cgwb_congested_tree);  in wb_congested_get_create()
444 	atomic_inc(&congested->refcnt);  in wb_congested_get_create()
447 	return congested;  in wb_congested_get_create()
456 void wb_congested_put(struct bdi_writeback_congested *congested)  in wb_congested_put()  argument
461 	if (!atomic_dec_and_lock(&congested->refcnt, &cgwb_lock)) {  in wb_congested_put()
467 	if (congested->bdi) {  in wb_congested_put()
468 		rb_erase(&congested->rb_node,  in wb_congested_put()
469 			 &congested->bdi->cgwb_congested_tree);  in wb_congested_put()
470 		congested->bdi = NULL;  in wb_congested_put()
474 	kfree(congested);  in wb_congested_put()
695 		struct bdi_writeback_congested *congested =  in cgwb_bdi_destroy()  local
699 		congested->bdi = NULL;	/* mark @congested unlinked */  in cgwb_bdi_destroy()
898 void clear_wb_congested(struct bdi_writeback_congested *congested, int sync)  in clear_wb_congested()  argument
904 	if (test_and_clear_bit(bit, &congested->state))  in clear_wb_congested()
912 void set_wb_congested(struct bdi_writeback_congested *congested, int sync)  in set_wb_congested()  argument
917 	if (!test_and_set_bit(bit, &congested->state))  in set_wb_congested()