taglinefilesource code
grp21065drivers/char/scc.cunsigned char grp1, grp2;
grp21072drivers/char/scc.cgrp2 = scc2->kiss.group;
grp21074drivers/char/scc.cif (scc2 == scc || !(scc2->tty && grp2)) 
grp21077drivers/char/scc.cif ((grp1 & 0x3f) == (grp2 & 0x3f))