50 static struct page *page_read(struct address_space *mapping, pgoff_t index)  in page_read()
59 	struct page *page;  in _block2mtd_erase()  local
66 		page = page_read(mapping, index);  in _block2mtd_erase()
67 		if (IS_ERR(page))  in _block2mtd_erase()
68 			return PTR_ERR(page);  in _block2mtd_erase()
70 		max = page_address(page) + PAGE_SIZE;  in _block2mtd_erase()
71 		for (p=page_address(page); p<max; p++)  in _block2mtd_erase()
73 				lock_page(page);  in _block2mtd_erase()
74 				memset(page_address(page), 0xff, PAGE_SIZE);  in _block2mtd_erase()
75 				set_page_dirty(page);  in _block2mtd_erase()
76 				unlock_page(page);  in _block2mtd_erase()
81 		put_page(page);  in _block2mtd_erase()
108 	struct page *page;  in block2mtd_read()  local
120 		page = page_read(dev->blkdev->bd_inode->i_mapping, index);  in block2mtd_read()
121 		if (IS_ERR(page))  in block2mtd_read()
122 			return PTR_ERR(page);  in block2mtd_read()
124 		memcpy(buf, page_address(page) + offset, cpylen);  in block2mtd_read()
125 		put_page(page);  in block2mtd_read()
141 	struct page *page;  in _block2mtd_write()  local
154 		page = page_read(mapping, index);  in _block2mtd_write()
155 		if (IS_ERR(page))  in _block2mtd_write()
156 			return PTR_ERR(page);  in _block2mtd_write()
158 		if (memcmp(page_address(page)+offset, buf, cpylen)) {  in _block2mtd_write()
159 			lock_page(page);  in _block2mtd_write()
160 			memcpy(page_address(page) + offset, buf, cpylen);  in _block2mtd_write()
161 			set_page_dirty(page);  in _block2mtd_write()
162 			unlock_page(page);  in _block2mtd_write()
165 		put_page(page);  in _block2mtd_write()