which_dev          40 kernel/trap.c    int which_dev = 0;
which_dev          69 kernel/trap.c    } else if ((which_dev = devintr()) != 0) {
which_dev          85 kernel/trap.c    if (which_dev == 2)
which_dev         139 kernel/trap.c    int which_dev = 0;
which_dev         149 kernel/trap.c    if ((which_dev = devintr()) == 0) {
which_dev         157 kernel/trap.c    if (which_dev == 2 && myproc() != 0)