50 	struct backing_dev_info *bdi;	/* our parent bdi */  member
112 int __must_check bdi_init(struct backing_dev_info *bdi);
113 void bdi_destroy(struct backing_dev_info *bdi);
116 int bdi_register(struct backing_dev_info *bdi, struct device *parent,
118 int bdi_register_dev(struct backing_dev_info *bdi, dev_t dev);
120 void bdi_start_writeback(struct backing_dev_info *bdi, long nr_pages,
122 void bdi_start_background_writeback(struct backing_dev_info *bdi);
124 int bdi_has_dirty_io(struct backing_dev_info *bdi);
125 void bdi_wakeup_thread_delayed(struct backing_dev_info *bdi);
139 static inline void __add_bdi_stat(struct backing_dev_info *bdi,  in __add_bdi_stat()  argument
142 	__percpu_counter_add(&bdi->bdi_stat[item], amount, BDI_STAT_BATCH);  in __add_bdi_stat()
145 static inline void __inc_bdi_stat(struct backing_dev_info *bdi,  in __inc_bdi_stat()  argument
148 	__add_bdi_stat(bdi, item, 1);  in __inc_bdi_stat()
151 static inline void inc_bdi_stat(struct backing_dev_info *bdi,  in inc_bdi_stat()  argument
157 	__inc_bdi_stat(bdi, item);  in inc_bdi_stat()
161 static inline void __dec_bdi_stat(struct backing_dev_info *bdi,  in __dec_bdi_stat()  argument
164 	__add_bdi_stat(bdi, item, -1);  in __dec_bdi_stat()
167 static inline void dec_bdi_stat(struct backing_dev_info *bdi,  in dec_bdi_stat()  argument
173 	__dec_bdi_stat(bdi, item);  in dec_bdi_stat()
177 static inline s64 bdi_stat(struct backing_dev_info *bdi,  in bdi_stat()  argument
180 	return percpu_counter_read_positive(&bdi->bdi_stat[item]);  in bdi_stat()
183 static inline s64 __bdi_stat_sum(struct backing_dev_info *bdi,  in __bdi_stat_sum()  argument
186 	return percpu_counter_sum_positive(&bdi->bdi_stat[item]);  in __bdi_stat_sum()
189 static inline s64 bdi_stat_sum(struct backing_dev_info *bdi,  in bdi_stat_sum()  argument
196 	sum = __bdi_stat_sum(bdi, item);  in bdi_stat_sum()
202 extern void bdi_writeout_inc(struct backing_dev_info *bdi);
207 static inline unsigned long bdi_stat_error(struct backing_dev_info *bdi)  in bdi_stat_error()  argument
216 int bdi_set_min_ratio(struct backing_dev_info *bdi, unsigned int min_ratio);
217 int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned int max_ratio);
246 int writeback_in_progress(struct backing_dev_info *bdi);
248 static inline int bdi_congested(struct backing_dev_info *bdi, int bdi_bits)  in bdi_congested()  argument
250 	if (bdi->congested_fn)  in bdi_congested()
251 		return bdi->congested_fn(bdi->congested_data, bdi_bits);  in bdi_congested()
252 	return (bdi->state & bdi_bits);  in bdi_congested()
255 static inline int bdi_read_congested(struct backing_dev_info *bdi)  in bdi_read_congested()  argument
257 	return bdi_congested(bdi, 1 << BDI_sync_congested);  in bdi_read_congested()
260 static inline int bdi_write_congested(struct backing_dev_info *bdi)  in bdi_write_congested()  argument
262 	return bdi_congested(bdi, 1 << BDI_async_congested);  in bdi_write_congested()
265 static inline int bdi_rw_congested(struct backing_dev_info *bdi)  in bdi_rw_congested()  argument
267 	return bdi_congested(bdi, (1 << BDI_sync_congested) |  in bdi_rw_congested()
276 void clear_bdi_congested(struct backing_dev_info *bdi, int sync);
277 void set_bdi_congested(struct backing_dev_info *bdi, int sync);
283 static inline bool bdi_cap_stable_pages_required(struct backing_dev_info *bdi)  in bdi_cap_stable_pages_required()  argument
285 	return bdi->capabilities & BDI_CAP_STABLE_WRITES;  in bdi_cap_stable_pages_required()
288 static inline bool bdi_cap_writeback_dirty(struct backing_dev_info *bdi)  in bdi_cap_writeback_dirty()  argument
290 	return !(bdi->capabilities & BDI_CAP_NO_WRITEBACK);  in bdi_cap_writeback_dirty()
293 static inline bool bdi_cap_account_dirty(struct backing_dev_info *bdi)  in bdi_cap_account_dirty()  argument
295 	return !(bdi->capabilities & BDI_CAP_NO_ACCT_DIRTY);  in bdi_cap_account_dirty()
298 static inline bool bdi_cap_account_writeback(struct backing_dev_info *bdi)  in bdi_cap_account_writeback()  argument
301 	return !(bdi->capabilities & (BDI_CAP_NO_ACCT_WB |  in bdi_cap_account_writeback()