8 struct page_counter {  struct
11 	struct page_counter *parent;  argument
24 static inline void page_counter_init(struct page_counter *counter,  in page_counter_init()  argument
25 				     struct page_counter *parent)  in page_counter_init()
32 static inline unsigned long page_counter_read(struct page_counter *counter)  in page_counter_read()
37 void page_counter_cancel(struct page_counter *counter, unsigned long nr_pages);
38 void page_counter_charge(struct page_counter *counter, unsigned long nr_pages);
39 bool page_counter_try_charge(struct page_counter *counter,
41 			     struct page_counter **fail);
42 void page_counter_uncharge(struct page_counter *counter, unsigned long nr_pages);
43 int page_counter_limit(struct page_counter *counter, unsigned long limit);
47 static inline void page_counter_reset_watermark(struct page_counter *counter)  in page_counter_reset_watermark()