linux-kernel - Re: [PATCH] usbip: Use fallthrough pseudo-keyword

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Date:   Tue, 07 Jul 2020 18:56:29 -0700
From:   Joe Perches <joe@...ches.com>
To:     Shuah Khan <skhan@...uxfoundation.org>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Valentina Manea <valentina.manea.m@...il.com>,
        Shuah Khan <shuah@...nel.org>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH] usbip: Use fallthrough pseudo-keyword

On Tue, 2020-07-07 at 14:06 -0600, Shuah Khan wrote:
> On 7/7/20 1:52 PM, Gustavo A. R. Silva wrote:
> > Replace the existing /* fall through */ comments and its variants with
> > the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
> > fall-through markings when it is the case.
> > 
> > [1] https://www.kernel.org/doc/html/latest/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through
> > 
> 
> Is fallthrough syntax supported on our min gcc version?

No.  Introduced in gcc 7.

> Does checkpatch or coccicheck catch these cases?

Kinda.  checkpatch isn't very good at it.
I _believe_, though I'm not at all sure,
that coccinelle can find these.