linux-kernel - Re: [PATCH net-next] macvlan: Mark expected switch fall-through

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Message-Id: <20190520.113812.944855298869290023.davem@davemloft.net>
Date:   Mon, 20 May 2019 11:38:12 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     gustavo@...eddedor.com
Cc:     liuhangbin@...il.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] macvlan: Mark expected switch fall-through

From: "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Date: Mon, 20 May 2019 09:44:49 -0500

> In preparation to enabling -Wimplicit-fallthrough, mark switch
> cases where we are expecting to fall through.
> 
> This patch fixes the following warning:
> 
> drivers/net/macvlan.c: In function ‘macvlan_do_ioctl’:
> drivers/net/macvlan.c:839:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
>    if (!net_eq(dev_net(dev), &init_net))
>       ^
> drivers/net/macvlan.c:841:2: note: here
>   case SIOCGHWTSTAMP:
>   ^~~~
> 
> Warning level 3 was used: -Wimplicit-fallthrough=3
> 
> This patch is part of the ongoing efforts to enable
> -Wimplicit-fallthrough.
> 
> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>

I'll apply this to 'net' since it was introduced actually by arecent
change.