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From: Pavel Machek <pavel@ucw.cz>
To: Al Viro <viro@zeniv.linux.org.uk>
Cc: Michael Witten <mfwitten@gmail.com>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Michal Marek <michal.lkml@markovi.net>,
	Cong Wang <xiyou.wangcong@gmail.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Sam Ravnborg <sam@ravnborg.org>,
	linux-kernel@vger.kernel.org, linux-kbuild@vger.kernel.org
Subject: Re: [PATCH] Makefile: Yes. Finally remove '-Wdeclaration-after-statement'
Date: Mon, 17 Aug 2020 22:42:24 +0200	[thread overview]
Message-ID: <20200817204223.GB12414@amd> (raw)
In-Reply-To: <20200816175303.GB1236603@ZenIV.linux.org.uk>

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Hi!

> > This is not just a matter of style; this is a matter of semantics,
> > especially with regard to:
> > 
> >   * const Correctness.
> >     A const-declared variable must be initialized when defined.
> > 
> >   * Conditional Compilation.
> >     When there is complex interaction between compile-time
> >     configuration options, it's essential to be able to
> >     make declarations where needed; otherwise unnecessary
> >     gymnastics are required to silence the compiler.
> > 
> > Gentleman... Just let people say exactly what they mean to say.
..

> You obviously need every bit of help in that task, judging by the amount
> of clarity (or thoughts, for that matter) visible in the spew above...
> 
> NAK.  And as for letting people say exactly what they mean to say...
> I am tempted to take you on that invitation, but that would be cruel
> to gregkh - he would have to reply to inevitable screeds about
> CoC-violating postings on l-k.

We should really get rid of CoC, because I'd really like to see you
_not_ resist that temptation.

But... he's right.

With rust-like programming style with widespread consts, this warning
has to go. And it is causing additional/ugly #ifdefs in some cases.

Maybe author can show examples in kernel .c where disabling the
warning would lead to nicer code. I believe we should give it a try.

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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  reply	other threads:[~2020-08-17 20:42 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-16 16:35 [PATCH] Makefile: Yes. Finally remove '-Wdeclaration-after-statement' Michael Witten
2020-08-16 17:53 ` Al Viro
2020-08-17 20:42   ` Pavel Machek [this message]
2020-08-17 21:12     ` Eric W. Biederman
2020-08-17 21:29       ` Linus Torvalds
2020-08-17 22:09         ` Pavel Machek
2020-08-17 22:12           ` Linus Torvalds
2020-08-18  5:17             ` Ingo Molnar
2020-08-18  8:56               ` David Laight
2020-08-16 17:56 ` Joe Perches
2020-08-17  3:37   ` Michael Witten
2020-08-17  4:19     ` Joe Perches
2020-08-17 11:40       ` Michael Witten
2020-08-17 20:38       ` Pavel Machek
2020-08-18 22:05     ` Michael Witten
2020-08-19 21:15       ` Michael Witten
2020-08-20  0:15         ` [RFC v2] kbuild: Introduce "Warnings for maintainers" Michael Witten

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