taglinefilesource code
io_bitmap60arch/i386/kernel/ioport.cset_bitmap((unsigned long *)current->tss.io_bitmap, from, num, !turn_on);
io_bitmap325arch/i386/kernel/process.cp->tss.bitmap = offsetof(struct thread_struct,io_bitmap);
io_bitmap327arch/i386/kernel/process.cp->tss.io_bitmap[i] = ~0;
io_bitmap102include/asm-i386/processor.hunsigned long  io_bitmap[IO_BITMAP_SIZE+1];