20 int __must_check bdi_init(struct backing_dev_info *bdi);
21 void bdi_exit(struct backing_dev_info *bdi);
24 int bdi_register(struct backing_dev_info *bdi, struct device *parent,
26 int bdi_register_dev(struct backing_dev_info *bdi, dev_t dev);
27 void bdi_unregister(struct backing_dev_info *bdi);
30 void bdi_destroy(struct backing_dev_info *bdi);
48 static inline bool bdi_has_dirty_io(struct backing_dev_info *bdi)  in bdi_has_dirty_io()  argument
54 	return atomic_long_read(&bdi->tot_write_bandwidth);  in bdi_has_dirty_io()
130 int bdi_set_min_ratio(struct backing_dev_info *bdi, unsigned int min_ratio);
131 int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned int max_ratio);
192 	struct backing_dev_info *bdi = wb->bdi;  in wb_congested()  local
194 	if (bdi->congested_fn)  in wb_congested()
195 		return bdi->congested_fn(bdi->congested_data, cong_bits);  in wb_congested()
204 static inline bool bdi_cap_stable_pages_required(struct backing_dev_info *bdi)  in bdi_cap_stable_pages_required()  argument
206 	return bdi->capabilities & BDI_CAP_STABLE_WRITES;  in bdi_cap_stable_pages_required()
209 static inline bool bdi_cap_writeback_dirty(struct backing_dev_info *bdi)  in bdi_cap_writeback_dirty()  argument
211 	return !(bdi->capabilities & BDI_CAP_NO_WRITEBACK);  in bdi_cap_writeback_dirty()
214 static inline bool bdi_cap_account_dirty(struct backing_dev_info *bdi)  in bdi_cap_account_dirty()  argument
216 	return !(bdi->capabilities & BDI_CAP_NO_ACCT_DIRTY);  in bdi_cap_account_dirty()
219 static inline bool bdi_cap_account_writeback(struct backing_dev_info *bdi)  in bdi_cap_account_writeback()  argument
222 	return !(bdi->capabilities & (BDI_CAP_NO_ACCT_WB |  in bdi_cap_account_writeback()
245 wb_congested_get_create(struct backing_dev_info *bdi, int blkcg_id, gfp_t gfp);
247 struct bdi_writeback *wb_get_create(struct backing_dev_info *bdi,
267 	struct backing_dev_info *bdi = inode_to_bdi(inode);  in inode_cgwb_enabled()  local
271 		bdi_cap_account_dirty(bdi) &&  in inode_cgwb_enabled()
272 		(bdi->capabilities & BDI_CAP_CGROUP_WRITEBACK) &&  in inode_cgwb_enabled()
284 static inline struct bdi_writeback *wb_find_current(struct backing_dev_info *bdi)  in wb_find_current()  argument
291 		return &bdi->wb;  in wb_find_current()
293 	wb = radix_tree_lookup(&bdi->cgwb_tree, memcg_css->id);  in wb_find_current()
314 wb_get_create_current(struct backing_dev_info *bdi, gfp_t gfp)  in wb_get_create_current()  argument
319 	wb = wb_find_current(bdi);  in wb_get_create_current()
328 		wb = wb_get_create(bdi, memcg_css, gfp);  in wb_get_create_current()
422 wb_congested_get_create(struct backing_dev_info *bdi, int blkcg_id, gfp_t gfp)  in wb_congested_get_create()  argument
424 	atomic_inc(&bdi->wb_congested->refcnt);  in wb_congested_get_create()
425 	return bdi->wb_congested;  in wb_congested_get_create()
434 static inline struct bdi_writeback *wb_find_current(struct backing_dev_info *bdi)  in wb_find_current()  argument
436 	return &bdi->wb;  in wb_find_current()
440 wb_get_create_current(struct backing_dev_info *bdi, gfp_t gfp)  in wb_get_create_current()  argument
442 	return &bdi->wb;  in wb_get_create_current()
496 static inline int bdi_congested(struct backing_dev_info *bdi, int cong_bits)  in bdi_congested()  argument
498 	return wb_congested(&bdi->wb, cong_bits);  in bdi_congested()
501 static inline int bdi_read_congested(struct backing_dev_info *bdi)  in bdi_read_congested()  argument
503 	return bdi_congested(bdi, 1 << WB_sync_congested);  in bdi_read_congested()
506 static inline int bdi_write_congested(struct backing_dev_info *bdi)  in bdi_write_congested()  argument
508 	return bdi_congested(bdi, 1 << WB_async_congested);  in bdi_write_congested()
511 static inline int bdi_rw_congested(struct backing_dev_info *bdi)  in bdi_rw_congested()  argument
513 	return bdi_congested(bdi, (1 << WB_sync_congested) |  in bdi_rw_congested()