parent            166 kernel/proc.c    p->parent = 0;
parent            295 kernel/proc.c    np->parent = p;
parent            313 kernel/proc.c      if(pp->parent == p){
parent            314 kernel/proc.c        pp->parent = initproc;
parent            351 kernel/proc.c    wakeup(p->parent);
parent            380 kernel/proc.c        if(pp->parent == p){
parent             96 kernel/proc.h    struct proc *parent;         // Parent process