From: Sven Eckelmann <sven@narfation.org>
To: Al Viro <viro@zeniv.linux.org.uk>, Arnd Bergmann <arnd@arndb.de>
Cc: Arnd Bergmann <arnd@arndb.de>,
b.a.t.m.a.n@lists.open-mesh.org,
linux-arch <linux-arch@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] asm-generic: avoid sparse {get,put}_unaligned warning
Date: Mon, 26 Jul 2021 17:04:46 +0200 [thread overview]
Message-ID: <3234493.RMHOAZ7QyG@ripper> (raw)
In-Reply-To: <CAK8P3a2MVQMFFBUzudy+yrcp4Md8mm=NcvX7YzGVz4C8W61sgQ@mail.gmail.com>
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On Monday, 26 July 2021 14:57:31 CEST Arnd Bergmann wrote:
> >
> > > The special attribute force must be used in such statements when the cast
> > > is known to be safe to avoid these warnings.
>
> I can see why this would warn, but I'm having trouble reproducing the
> warning on linux-next.
I have sparse 0.6.3 on an Debian bullseye amd64 system. Sources are from
linux-next next-20210723
make allnoconfig
cat >> .config << "EOF"
CONFIG_NET=y
CONFIG_INET=y
CONFIG_BATMAN_ADV=y
CONFIG_BATMAN_ADV_DAT=y
EOF
make olddefconfig
make CHECK="sparse -Wbitwise-pointer" C=1
I should maybe have made this clearer in the last sentence of the first
paragraph: "This is also true for pointers to variables with this type when
-Wbitwise-pointer is activated."
Kind regards,
Sven
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next prev parent reply other threads:[~2021-07-26 15:04 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-24 16:24 [PATCH] asm-generic: avoid sparse {get,put}_unaligned warning Sven Eckelmann
2021-07-24 17:01 ` Al Viro
2021-07-26 12:57 ` Arnd Bergmann
2021-07-26 15:04 ` Sven Eckelmann [this message]
2021-07-26 16:22 ` Arnd Bergmann
2021-07-27 8:44 ` David Laight
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