3160 	size_t iosize;  in btrfs_do_readpage()  local
3181 			iosize = PAGE_SIZE - zero_offset;  in btrfs_do_readpage()
3183 			memset(userpage + zero_offset, 0, iosize);  in btrfs_do_readpage()
3196 			iosize = PAGE_SIZE - pg_offset;  in btrfs_do_readpage()
3198 			memset(userpage + pg_offset, 0, iosize);  in btrfs_do_readpage()
3201 			set_extent_uptodate(tree, cur, cur + iosize - 1,  in btrfs_do_readpage()
3204 					     cur + iosize - 1, &cached);  in btrfs_do_readpage()
3224 		iosize = min(extent_map_end(em) - cur, end - cur + 1);  in btrfs_do_readpage()
3226 		iosize = ALIGN(iosize, blocksize);  in btrfs_do_readpage()
3232 			disk_io_size = iosize;  in btrfs_do_readpage()
3289 			memset(userpage + pg_offset, 0, iosize);  in btrfs_do_readpage()
3293 			set_extent_uptodate(tree, cur, cur + iosize - 1,  in btrfs_do_readpage()
3296 					     cur + iosize - 1, &cached);  in btrfs_do_readpage()
3297 			cur = cur + iosize;  in btrfs_do_readpage()
3298 			pg_offset += iosize;  in btrfs_do_readpage()
3305 			unlock_extent(tree, cur, cur + iosize - 1);  in btrfs_do_readpage()
3306 			cur = cur + iosize;  in btrfs_do_readpage()
3307 			pg_offset += iosize;  in btrfs_do_readpage()
3315 			unlock_extent(tree, cur, cur + iosize - 1);  in btrfs_do_readpage()
3316 			cur = cur + iosize;  in btrfs_do_readpage()
3317 			pg_offset += iosize;  in btrfs_do_readpage()
3333 			unlock_extent(tree, cur, cur + iosize - 1);  in btrfs_do_readpage()
3336 		cur = cur + iosize;  in btrfs_do_readpage()
3337 		pg_offset += iosize;  in btrfs_do_readpage()
3471 	u64 iosize;  in __extent_writepage_io()  local
3518 		iosize = min(em_end - cur, end - cur + 1);  in __extent_writepage_io()
3519 		iosize = ALIGN(iosize, blocksize);  in __extent_writepage_io()
3536 							cur + iosize - 1, 1);  in __extent_writepage_io()
3537 			cur += iosize;  in __extent_writepage_io()
3538 			pg_offset += iosize;  in __extent_writepage_io()
3542 		btrfs_set_range_writeback(tree, cur, cur + iosize - 1);  in __extent_writepage_io()
3550 					 page, offset, iosize, pg_offset,  in __extent_writepage_io()
3560 		cur = cur + iosize;  in __extent_writepage_io()
3561 		pg_offset += iosize;  in __extent_writepage_io()