taglinefilesource code
froml48kernel/ioport.cunsigned long froml, lindex, tnum, numl, rindex, mask;
froml51kernel/ioport.cfroml = from >> 5;
froml59kernel/ioport.cif (froml * 32 + tnum > sizeof(current->tss.io_bitmap) * 8 - 8)
froml67kernel/ioport.ciop = (unsigned long *)current->tss.io_bitmap + froml;