3158 	size_t iosize;  in btrfs_do_readpage()  local
3179 			iosize = PAGE_SIZE - zero_offset;  in btrfs_do_readpage()
3181 			memset(userpage + zero_offset, 0, iosize);  in btrfs_do_readpage()
3194 			iosize = PAGE_SIZE - pg_offset;  in btrfs_do_readpage()
3196 			memset(userpage + pg_offset, 0, iosize);  in btrfs_do_readpage()
3199 			set_extent_uptodate(tree, cur, cur + iosize - 1,  in btrfs_do_readpage()
3202 					     cur + iosize - 1, &cached);  in btrfs_do_readpage()
3222 		iosize = min(extent_map_end(em) - cur, end - cur + 1);  in btrfs_do_readpage()
3224 		iosize = ALIGN(iosize, blocksize);  in btrfs_do_readpage()
3230 			disk_io_size = iosize;  in btrfs_do_readpage()
3287 			memset(userpage + pg_offset, 0, iosize);  in btrfs_do_readpage()
3291 			set_extent_uptodate(tree, cur, cur + iosize - 1,  in btrfs_do_readpage()
3294 					     cur + iosize - 1, &cached);  in btrfs_do_readpage()
3295 			cur = cur + iosize;  in btrfs_do_readpage()
3296 			pg_offset += iosize;  in btrfs_do_readpage()
3303 			unlock_extent(tree, cur, cur + iosize - 1);  in btrfs_do_readpage()
3304 			cur = cur + iosize;  in btrfs_do_readpage()
3305 			pg_offset += iosize;  in btrfs_do_readpage()
3313 			unlock_extent(tree, cur, cur + iosize - 1);  in btrfs_do_readpage()
3314 			cur = cur + iosize;  in btrfs_do_readpage()
3315 			pg_offset += iosize;  in btrfs_do_readpage()
3331 			unlock_extent(tree, cur, cur + iosize - 1);  in btrfs_do_readpage()
3334 		cur = cur + iosize;  in btrfs_do_readpage()
3335 		pg_offset += iosize;  in btrfs_do_readpage()
3469 	u64 iosize;  in __extent_writepage_io()  local
3516 		iosize = min(em_end - cur, end - cur + 1);  in __extent_writepage_io()
3517 		iosize = ALIGN(iosize, blocksize);  in __extent_writepage_io()
3534 							cur + iosize - 1, 1);  in __extent_writepage_io()
3535 			cur += iosize;  in __extent_writepage_io()
3536 			pg_offset += iosize;  in __extent_writepage_io()
3540 		btrfs_set_range_writeback(tree, cur, cur + iosize - 1);  in __extent_writepage_io()
3548 					 page, offset, iosize, pg_offset,  in __extent_writepage_io()
3558 		cur = cur + iosize;  in __extent_writepage_io()
3559 		pg_offset += iosize;  in __extent_writepage_io()