pipe_peer
kf->pipe_peer = PTRTOINT64(pipe.pipe_peer);
kf->pipe_peer = PTRTOINT64(pipe->pipe_peer);
pp->pp_wpipe.pipe_peer = &pp->pp_rpipe;
pp->pp_rpipe.pipe_peer = &pp->pp_wpipe;
struct pipe *pipe_peer(struct pipe *);
peer = cpipe->pipe_peer;
wpipe = pipe_peer(rpipe);
if ((ppipe = cpipe->pipe_peer) != NULL) {
ppipe->pipe_peer = NULL;
wpipe = pipe_peer(rpipe);
wpipe = pipe_peer(rpipe);
wpipe = pipe_peer(rpipe);
wpipe = pipe_peer(rpipe);
struct pipe *pipe_peer; /* [p] link with other direction */
uint64_t pipe_peer; /* PTR: link with other direction */
maxaddr = (void *)(uintptr_t)MAXIMUM(kf->f_data, kf->pipe_peer);