From: "Arnd Bergmann" <arnd@arndb.de>
To: "Dan Carpenter" <dan.carpenter@linaro.org>
Cc: "Naresh Kamboju" <naresh.kamboju@linaro.org>,
"open list" <linux-kernel@vger.kernel.org>,
lkft-triage@lists.linaro.org,
"Linux Regressions" <regressions@lists.linux.dev>,
linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
"Aneesh Kumar K.V" <aneesh.kumar@kernel.org>,
"Anders Roxell" <anders.roxell@linaro.org>,
"Kees Cook" <keescook@chromium.org>,
"Niklas Schnelle" <schnelle@linux.ibm.com>,
clang-built-linux <llvm@lists.linux.dev>,
"Nick Desaulniers" <ndesaulniers@google.com>,
"Nathan Chancellor" <nathan@kernel.org>,
"Jeff Xu" <jeffxu@chromium.org>,
"Naveen N. Rao" <naveen.n.rao@linux.ibm.com>
Subject: Re: powerpc: io-defs.h:43:1: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic]
Date: Tue, 16 Apr 2024 14:44:30 +0200 [thread overview]
Message-ID: <d409712b-6fca-4571-8fe0-1da8c4ab769b@app.fastmail.com> (raw)
In-Reply-To: <402a5e3b-bdb5-40a4-8a44-2de497849c3f@moroto.mountain>
On Tue, Apr 16, 2024, at 14:42, Dan Carpenter wrote:
> On Tue, Apr 16, 2024 at 01:55:57PM +0200, Arnd Bergmann wrote:
>> On Tue, Apr 16, 2024, at 13:01, Arnd Bergmann wrote:
>> > On Tue, Apr 16, 2024, at 11:32, Naresh Kamboju wrote:
>> >> The Powerpc clang builds failed due to following warnings / errors on the
>> >> Linux next-20240416 tag.
>> >>
>> >> Powerpc:
>> >> - tqm8xx_defconfig + clang-17 - Failed
>> >> - allnoconfig + clang-17 - Failed
>> >> - tinyconfig + clang-17 - Failed
>> >>
>> >> Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
>> >
>> > I'm not sure why this showed up now, but there is a series from
>> > in progress that will avoid this in the future, as the same
>> > issue is present on a couple of other architectures.
>> >
>>
>> I see now, it was introduced by my patch to turn on -Wextra
>> by default. I had tested that patch on all architectures
>> with allmodconfig and defconfig, but I did not test any
>> powerpc configs with PCI disabled.
>
> I think this warning is clang specific as well... (Maybe clang was
> included in all architectures but I'm not sure).
Yes, I did test with both gcc and clang where supported.
Arnd
prev parent reply other threads:[~2024-04-16 12:44 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-16 9:32 powerpc: io-defs.h:43:1: error: performing pointer arithmetic on a null pointer has undefined behavior [-Werror,-Wnull-pointer-arithmetic] Naresh Kamboju
2024-04-16 10:38 ` Segher Boessenkool
2024-04-16 11:09 ` David Laight
2024-04-16 11:01 ` Arnd Bergmann
2024-04-16 11:55 ` Arnd Bergmann
2024-04-16 12:42 ` Dan Carpenter
2024-04-16 12:44 ` Arnd Bergmann [this message]
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