linux-kernel - Re: [trivial PATCH] treewide: Convert switch/case fallthrough; to break;

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Date:   Wed, 09 Sep 2020 14:09:32 -0700
From:   Joe Perches <joe@...ches.com>
To:     Keith Busch <kbusch@...nel.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        linux-crypto@...r.kernel.org
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Jiri Kosina <trivial@...nel.org>,
        Kees Cook <kees.cook@...onical.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Subject: Re: [trivial PATCH] treewide: Convert switch/case fallthrough; to
 break;

On Wed, 2020-09-09 at 13:55 -0700, Keith Busch wrote:
> On Wed, Sep 09, 2020 at 01:06:39PM -0700, Joe Perches wrote:
> > diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
> > index eea0f453cfb6..8aac5bc60f4c 100644
> > --- a/crypto/tcrypt.c
> > +++ b/crypto/tcrypt.c
> > @@ -2464,7 +2464,7 @@ static int do_test(const char *alg, u32 type, u32 mask, int m, u32 num_mb)
> >  		test_hash_speed("streebog512", sec,
> >  				generic_hash_speed_template);
> >  		if (mode > 300 && mode < 400) break;
> > -		fallthrough;
> > +		break;
> >  	case 399:
> >  		break;
> 
> Just imho, this change makes the preceding 'if' look even more
> pointless. Maybe the fallthrough was a deliberate choice? Not that my
> opinion matters here as I don't know this module, but it looked a bit
> odd to me.

It does look odd to me too.

It's also just a test module though so the
code isn't particularly crucial.

Herbert/David? thoughts?