187 	struct bdi_writeback wb;  /* the root writeback info for this bdi */  member
229 static inline bool wb_tryget(struct bdi_writeback *wb)  in wb_tryget()  argument
231 	if (wb != &wb->bdi->wb)  in wb_tryget()
232 		return percpu_ref_tryget(&wb->refcnt);  in wb_tryget()
240 static inline void wb_get(struct bdi_writeback *wb)  in wb_get()  argument
242 	if (wb != &wb->bdi->wb)  in wb_get()
243 		percpu_ref_get(&wb->refcnt);  in wb_get()
250 static inline void wb_put(struct bdi_writeback *wb)  in wb_put()  argument
252 	if (WARN_ON_ONCE(!wb->bdi)) {  in wb_put()
260 	if (wb != &wb->bdi->wb)  in wb_put()
261 		percpu_ref_put(&wb->refcnt);  in wb_put()
270 static inline bool wb_dying(struct bdi_writeback *wb)  in wb_dying()  argument
272 	return percpu_ref_is_dying(&wb->refcnt);  in wb_dying()
277 static inline bool wb_tryget(struct bdi_writeback *wb)  in wb_tryget()  argument
282 static inline void wb_get(struct bdi_writeback *wb)  in wb_get()  argument
286 static inline void wb_put(struct bdi_writeback *wb)  in wb_put()  argument
290 static inline bool wb_dying(struct bdi_writeback *wb)  in wb_dying()  argument