38 static inline void page_counter_init(struct page_counter *counter,  in page_counter_init()  argument
41 	atomic_long_set(&counter->usage, 0);  in page_counter_init()
42 	counter->max = PAGE_COUNTER_MAX;  in page_counter_init()
43 	counter->parent = parent;  in page_counter_init()
46 static inline unsigned long page_counter_read(struct page_counter *counter)  in page_counter_read()  argument
48 	return atomic_long_read(&counter->usage);  in page_counter_read()
51 void page_counter_cancel(struct page_counter *counter, unsigned long nr_pages);
52 void page_counter_charge(struct page_counter *counter, unsigned long nr_pages);
53 bool page_counter_try_charge(struct page_counter *counter,
56 void page_counter_uncharge(struct page_counter *counter, unsigned long nr_pages);
57 void page_counter_set_min(struct page_counter *counter, unsigned long nr_pages);
58 void page_counter_set_low(struct page_counter *counter, unsigned long nr_pages);
60 static inline void page_counter_set_high(struct page_counter *counter,  in page_counter_set_high()  argument
63 	WRITE_ONCE(counter->high, nr_pages);  in page_counter_set_high()
66 int page_counter_set_max(struct page_counter *counter, unsigned long nr_pages);
70 static inline void page_counter_reset_watermark(struct page_counter *counter)  in page_counter_reset_watermark()  argument
72 	counter->watermark = page_counter_read(counter);  in page_counter_reset_watermark()