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remove obsoleted comment. pointed out by s-yamaguchi@IIJ.

This commit is contained in:
knakahara 2017-05-31 08:19:44 +00:00
parent 0cf335f02e
commit 516a5b9a9a
1 changed files with 3 additions and 3 deletions
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6
sys/net/if_l2tp.h
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@ -1,4 +1,4 @@
/* $NetBSD: if_l2tp.h,v 1.1 2017/02/16 08:23:35 knakahara Exp $ */
/* $NetBSD: if_l2tp.h,v 1.2 2017/05/31 08:19:44 knakahara Exp $ */
/*
* Copyright (c) 2017 Internet Initiative Japan Inc.
@ -201,8 +201,8 @@ struct mbuf *l2tp_tcpmss_clamp(struct ifnet *, struct mbuf *);
* NOTICE
* - l2tp_softc must not have a variant value while the l2tp tunnel exists.
* Such variant values must be in l2tp_softc->l2tp_var.
* - l2tp_softc->l2tp_var is modified by atomic_swap_ptr() like
* read-copy-update. So, once we dereference l2tp_softc->l2tp_var, we must
* - l2tp_softc->l2tp_var is modified like read-copy-update.
* So, once we dereference l2tp_softc->l2tp_var, we must
* keep the pointer during the same context. If we re-derefence
* l2tp_softc->l2tp_var, the l2tp_var may be other one because of
* concurrent writer processing.