taglinefilesource code
cur_capacity01662drivers/block/ide.ccheck = (id->cur_capacity0 << 16) | id->cur_capacity1;
cur_capacity01664drivers/block/ide.c*((int *)&id->cur_capacity0) = capacity; /* fix it */
cur_capacity0120include/linux/hdreg.hunsigned short  cur_capacity0;  /* logical total sectors on drive */