../../proc/mgt.c:526:8: error: conflicting types for 'count_up' void count_up (struct proc *p, void *counter) ^ ../../proc/proc.h:164:6: note: previous declaration is here void count_up (void *); ^ ../../proc/mgt.c:526:48: error: expected ';' at end of declaration void count_up (struct proc *p, void *counter) ^ ; 2 errors generated.