linux-kernel - RE: [PATCH v2] kbuild: Change fallthrough comments to attributes

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Date:   Tue, 13 Aug 2019 09:48:01 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Joe Perches' <joe@...ches.com>,
        Nathan Chancellor <natechancellor@...il.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>
CC:     Nathan Huckleberry <nhuck@...gle.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux Memory Management List <linux-mm@...ck.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Subject: RE: [PATCH v2] kbuild: Change fallthrough comments to attributes

From: Joe Perches
> Sent: 13 August 2019 08:05
...
> The afs ones seem to be because the last comment in the block
> is not the fallthrough, but a description of the next case;
> 
> e.g.: from fs/afs/fsclient.c:
> 
> 		/* extract the volume name */
> 	case 3:
> 		_debug("extract volname");

I'd change those to:
	case 3:  /* extract the volume name */

Then the /* fall through */ would be fine.

The /* FALLTHROUGH */ comment has been valid C syntax (for lint)
for over 40 years.
IMHO since C compilers are now doing all the checks that lint used
to do, it should be using the same syntax.
Both the [[]] and attribute forms look horrid.

	David

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