117 struct dio {  struct
123 	dio_iodone_t *end_io;		/* IO completion function */  argument
124 	bool is_pinned;			/* T if we have pins on the pages */
126 	void *private;			/* copy from map_bh.b_private */
129 	spinlock_t bio_lock;		/* protects BIO fields below */
130 	int page_errors;		/* err from iov_iter_extract_pages() */
154 static struct kmem_cache *dio_cache __read_mostly;  argument
167 static inline int dio_refill_pages(struct dio *dio, struct dio_submit *sdio)  in dio_refill_pages()
208 static inline struct page *dio_get_page(struct dio *dio,  in dio_get_page()
222 static void dio_pin_page(struct dio *dio, struct page *page)  in dio_pin_page()
228 static void dio_unpin_page(struct dio *dio, struct page *page)  in dio_unpin_page()
245 static ssize_t dio_complete(struct dio *dio, ssize_t ret, unsigned int flags)  in dio_complete()
324 	struct dio *dio = container_of(work, struct dio, complete_work);  in dio_aio_complete_work()  local
336 	struct dio *dio = bio->bi_private;  in dio_bio_end_aio()  local
383 	struct dio *dio = bio->bi_private;  in dio_bio_end_io()  local
395 dio_bio_alloc(struct dio *dio, struct dio_submit *sdio,  in dio_bio_alloc()
424 static inline void dio_bio_submit(struct dio *dio, struct dio_submit *sdio)  in dio_bio_submit()
451 static inline void dio_cleanup(struct dio *dio, struct dio_submit *sdio)  in dio_cleanup()
465 static struct bio *dio_await_one(struct dio *dio)  in dio_await_one()
498 static blk_status_t dio_bio_complete(struct dio *dio, struct bio *bio)  in dio_bio_complete()
527 static void dio_await_completion(struct dio *dio)  in dio_await_completion()
544 static inline int dio_bio_reap(struct dio *dio, struct dio_submit *sdio)  in dio_bio_reap()
567 static int dio_set_defer_completion(struct dio *dio)  in dio_set_defer_completion()
602 static int get_more_blocks(struct dio *dio, struct dio_submit *sdio,  in get_more_blocks()
662 static inline int dio_new_bio(struct dio *dio, struct dio_submit *sdio,  in dio_new_bio()
687 static inline int dio_bio_add_page(struct dio *dio, struct dio_submit *sdio)  in dio_bio_add_page()
719 static inline int dio_send_cur_page(struct dio *dio, struct dio_submit *sdio,  in dio_send_cur_page()
784 submit_page_section(struct dio *dio, struct dio_submit *sdio, struct page *page,  in submit_page_section()
851 static inline void dio_zero_block(struct dio *dio, struct dio_submit *sdio,  in dio_zero_block()
902 static int do_direct_IO(struct dio *dio, struct dio_submit *sdio,  in do_direct_IO()
1057 static inline int drop_refcount(struct dio *dio)  in drop_refcount()
1116 	struct dio *dio;  in __blockdev_direct_IO()  local