pr                 80 kernel/pipe.c    struct proc *pr = myproc();
pr                 84 kernel/pipe.c      if(pi->readopen == 0 || killed(pr)){
pr                 93 kernel/pipe.c        if(copyin(pr->pagetable, &ch, addr + i, 1) == -1)
pr                109 kernel/pipe.c    struct proc *pr = myproc();
pr                114 kernel/pipe.c      if(killed(pr)){
pr                124 kernel/pipe.c      if(copyout(pr->pagetable, addr + i, &ch, 1) == -1)
pr                 24 kernel/printf.c } pr;
pr                 71 kernel/printf.c     acquire(&pr.lock);
pr                131 kernel/printf.c     release(&pr.lock);
pr                150 kernel/printf.c   initlock(&pr.lock, "pr");