linux-kernel - Re: [PATCH] ser_gigaset: mark expected switch fall-through

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Date:   Tue, 12 Feb 2019 10:29:34 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     gustavo@...eddedor.com
Cc:     pebolle@...cali.nl, isdn@...ux-pingi.de,
        gigaset307x-common@...ts.sourceforge.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, keescook@...omium.org
Subject: Re: [PATCH] ser_gigaset: mark expected switch fall-through

From: "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Date: Mon, 11 Feb 2019 16:34:44 -0600

> In preparation to enabling -Wimplicit-fallthrough, mark switch
> cases where we are expecting to fall through.
> 
> This patch fixes the following warning:
> 
> drivers/isdn/gigaset/ser-gigaset.c: In function ‘gigaset_tty_ioctl’:
> drivers/isdn/gigaset/ser-gigaset.c:627:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
>    switch (arg) {
>    ^~~~~~
> drivers/isdn/gigaset/ser-gigaset.c:638:2: note: here
>   default:
>   ^~~~~~~
> 
> Warning level 3 was used: -Wimplicit-fallthrough=3
> 
> Notice that, in this particular case, the code comment is modified
> in accordance with what GCC is expecting to find.
> 
> This patch is part of the ongoing efforts to enable
> -Wimplicit-fallthrough.
> 
> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>

Applied.