taglinefilesource code
cur_capacity12083drivers/block/ide.ccheck = (id->cur_capacity0 << 16) | id->cur_capacity1;
cur_capacity12087drivers/block/ide.cid->cur_capacity1 = (capacity >> 16) & 0xffff;
cur_capacity1137include/linux/hdreg.hunsigned short  cur_capacity1;  /*  (2 words, misaligned int)     */