pipe_create
static int pipe_create(struct pipe *pipe, bool backing);
error = pipe_create(rpipe, true);
error = pipe_create(wpipe, false);
MAC_POLICY_PERFORM_NOSLEEP(pipe_create, cred, pp, pp->pp_label);
COUNTER_DECL(pipe_create);
COUNTER_INC(pipe_create);
{ pipe_create, "pipe" },