111 	struct iomap_page *iop = to_iomap_page(page);  in iomap_page_create()  local
113 	if (iop || i_blocksize(inode) == PAGE_SIZE)  in iomap_page_create()
114 		return iop;  in iomap_page_create()
116 	iop = kmalloc(sizeof(*iop), GFP_NOFS | __GFP_NOFAIL);  in iomap_page_create()
117 	atomic_set(&iop->read_count, 0);  in iomap_page_create()
118 	atomic_set(&iop->write_count, 0);  in iomap_page_create()
119 	bitmap_zero(iop->uptodate, PAGE_SIZE / SECTOR_SIZE);  in iomap_page_create()
120 	set_page_private(page, (unsigned long)iop);  in iomap_page_create()
122 	return iop;  in iomap_page_create()
128 	struct iomap_page *iop = to_iomap_page(page);  in iomap_page_release()  local
130 	if (!iop)  in iomap_page_release()
132 	WARN_ON_ONCE(atomic_read(&iop->read_count));  in iomap_page_release()
133 	WARN_ON_ONCE(atomic_read(&iop->write_count));  in iomap_page_release()
136 	kfree(iop);  in iomap_page_release()
143 iomap_adjust_read_range(struct inode *inode, struct iomap_page *iop,  in iomap_adjust_read_range()  argument
159 	if (iop) {  in iomap_adjust_read_range()
164 			if (!test_bit(i, iop->uptodate))  in iomap_adjust_read_range()
174 			if (test_bit(i, iop->uptodate)) {  in iomap_adjust_read_range()
197 	struct iomap_page *iop = to_iomap_page(page);  in iomap_set_range_uptodate()  local
204 	if (iop) {  in iomap_set_range_uptodate()
207 				set_bit(i, iop->uptodate);  in iomap_set_range_uptodate()
208 			else if (!test_bit(i, iop->uptodate))  in iomap_set_range_uptodate()
218 iomap_read_finish(struct iomap_page *iop, struct page *page)  in iomap_read_finish()  argument
220 	if (!iop || atomic_dec_and_test(&iop->read_count))  in iomap_read_finish()
228 	struct iomap_page *iop = to_iomap_page(page);  in iomap_read_page_end_io()  local
237 	iomap_read_finish(iop, page);  in iomap_read_page_end_io()
286 	struct iomap_page *iop = iomap_page_create(inode, page);  in iomap_readpage_actor()  local
299 	iomap_adjust_read_range(inode, iop, &pos, length, &poff, &plen);  in iomap_readpage_actor()
326 	if (iop)  in iomap_readpage_actor()
327 		atomic_inc(&iop->read_count);  in iomap_readpage_actor()
495 	struct iomap_page *iop = to_iomap_page(page);  in iomap_is_partially_uptodate()  local
501 	if (iop) {  in iomap_is_partially_uptodate()
503 			if (!test_bit(i, iop->uptodate))  in iomap_is_partially_uptodate()
608 	struct iomap_page *iop = iomap_page_create(inode, page);  in __iomap_write_begin()  local
619 		iomap_adjust_read_range(inode, iop, &block_start,  in __iomap_write_begin()