linux-kernel - Re: [PATCH 1/3] kbuild: Add -Wshadow to sparse

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Date:   Wed, 17 Oct 2018 22:13:01 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Luc Van Oostenryck <luc.vanoostenryck@...il.com>
Cc:     linux-kernel@...r.kernel.org, tglx@...utronix.de,
        linux-kbuild@...r.kernel.org, linux-sparse@...r.kernel.org,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michal Marek <michal.lkml@...kovi.net>
Subject: Re: [PATCH 1/3] kbuild: Add -Wshadow to sparse

On 2018-10-17 21:25:02 [+0200], Luc Van Oostenryck wrote:
> Hi,
Hi,

> I made a quick test and I saw it would add a lot of noise because of
> (valid) warnings coming from macros using a statement expression
> redeclaring variables like '__u', 'tmp', ...
> 
> BTW, as far as I can see, sparse never had it enabled by default.

I must have seen those warnings with C=1 _years_ ago otherwise I
wouldn't know about that feature. Or it was enabled by the check process
and got disabled but I can't find evidence for it.

> Kind regards,
> -- Luc Van Oostenryck

Sebastian