linux-kernel - RE: [PATCH] net_sched: use explicit size of struct tcmsg, remove need to declare tcm

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Date:   Mon, 18 Sep 2017 15:10:34 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Eric Dumazet' <eric.dumazet@...il.com>
CC:     'Colin King' <colin.king@...onical.com>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Cong Wang <xiyou.wangcong@...il.com>,
        Jiri Pirko <jiri@...nulli.us>,
        "David S . Miller" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] net_sched: use explicit size of struct tcmsg, remove
 need to declare tcm

From: Eric Dumazet
> Sent: 18 September 2017 16:01
...
> > > -	err = nlmsg_parse(nlh, sizeof(*tcm), tca, TCA_MAX, NULL, NULL);
> > > +	err = nlmsg_parse(nlh, sizeof(struct tcmsg), tca, TCA_MAX, NULL, NULL);
> >
> > Would sizeof(*nlmsg_data(nlh)) be cleaner??
> 
> Not really, since
> 
> static inline void *nlmsg_data(const struct nlmsghdr *nlh)

I thought about that after posting :-(

	David