From: Nathan Chancellor <nathan@kernel.org>
To: kernel test robot <lkp@intel.com>
Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org,
linux-kernel@vger.kernel.org,
Dmitry Torokhov <dmitry.torokhov@gmail.com>
Subject: Re: drivers/input/touchscreen/ads7846.c:705:24: warning: taking address of packed member 'data' of class or structure 'ads7846_buf' may result in an unaligned pointer value
Date: Sat, 29 Jan 2022 13:30:50 -0700 [thread overview]
Message-ID: <YfWj+hnMiK8dECOp@dev-arch.archlinux-ax161> (raw)
In-Reply-To: <202201300020.SS6KSznh-lkp@intel.com>
On Sun, Jan 30, 2022 at 12:10:55AM +0800, kernel test robot wrote:
> Hi Dmitry,
>
> FYI, the error/warning still remains.
>
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: cb323ee75d24e7acc2f188d123ba6df46159cf09
> commit: 415e915fdfc775ad0c6675fde1008f6f43dd6251 Merge tag 'v5.11' into next
> date: 11 months ago
> config: mips-randconfig-r025-20220129 (https://download.01.org/0day-ci/archive/20220130/202201300020.SS6KSznh-lkp@intel.com/config)
> compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 33b45ee44b1f32ffdbc995e6fec806271b4b3ba4)
> reproduce (this is a W=1 build):
> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> chmod +x ~/bin/make.cross
> # install mips cross compiling tool for clang build
> # apt-get install binutils-mips-linux-gnu
> # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=415e915fdfc775ad0c6675fde1008f6f43dd6251
> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> git fetch --no-tags linus master
> git checkout 415e915fdfc775ad0c6675fde1008f6f43dd6251
> # save the config file to linux build tree
> mkdir build_dir
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash arch/mips/kernel/ drivers/input/touchscreen/
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
>
> All warnings (new ones prefixed by >>):
>
> >> drivers/input/touchscreen/ads7846.c:705:24: warning: taking address of packed member 'data' of class or structure 'ads7846_buf' may result in an unaligned pointer value [-Waddress-of-packed-member]
> value = be16_to_cpup(&buf->data);
> ^~~~~~~~~
> 1 warning generated.
Same root cause as https://lore.kernel.org/r/YenXz+RznXBuJMSR@dev-arch.archlinux-ax161/.
Fixed with https://lore.kernel.org/r/20220125221925.3547683-2-nathan@kernel.org/.
Sorry for the noise, this should have only been sent to our mailing
list, not maintainers.
Cheers,
Nathan
WARNING: multiple messages have this Message-ID (diff)
From: Nathan Chancellor <nathan@kernel.org>
To: kbuild-all@lists.01.org
Subject: Re: drivers/input/touchscreen/ads7846.c:705:24: warning: taking address of packed member 'data' of class or structure 'ads7846_buf' may result in an unaligned pointer value
Date: Sat, 29 Jan 2022 13:30:50 -0700 [thread overview]
Message-ID: <YfWj+hnMiK8dECOp@dev-arch.archlinux-ax161> (raw)
In-Reply-To: <202201300020.SS6KSznh-lkp@intel.com>
[-- Attachment #1: Type: text/plain, Size: 2288 bytes --]
On Sun, Jan 30, 2022 at 12:10:55AM +0800, kernel test robot wrote:
> Hi Dmitry,
>
> FYI, the error/warning still remains.
>
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: cb323ee75d24e7acc2f188d123ba6df46159cf09
> commit: 415e915fdfc775ad0c6675fde1008f6f43dd6251 Merge tag 'v5.11' into next
> date: 11 months ago
> config: mips-randconfig-r025-20220129 (https://download.01.org/0day-ci/archive/20220130/202201300020.SS6KSznh-lkp(a)intel.com/config)
> compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 33b45ee44b1f32ffdbc995e6fec806271b4b3ba4)
> reproduce (this is a W=1 build):
> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> chmod +x ~/bin/make.cross
> # install mips cross compiling tool for clang build
> # apt-get install binutils-mips-linux-gnu
> # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=415e915fdfc775ad0c6675fde1008f6f43dd6251
> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> git fetch --no-tags linus master
> git checkout 415e915fdfc775ad0c6675fde1008f6f43dd6251
> # save the config file to linux build tree
> mkdir build_dir
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash arch/mips/kernel/ drivers/input/touchscreen/
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
>
> All warnings (new ones prefixed by >>):
>
> >> drivers/input/touchscreen/ads7846.c:705:24: warning: taking address of packed member 'data' of class or structure 'ads7846_buf' may result in an unaligned pointer value [-Waddress-of-packed-member]
> value = be16_to_cpup(&buf->data);
> ^~~~~~~~~
> 1 warning generated.
Same root cause as https://lore.kernel.org/r/YenXz+RznXBuJMSR(a)dev-arch.archlinux-ax161/.
Fixed with https://lore.kernel.org/r/20220125221925.3547683-2-nathan(a)kernel.org/.
Sorry for the noise, this should have only been sent to our mailing
list, not maintainers.
Cheers,
Nathan
next prev parent reply other threads:[~2022-01-29 20:30 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-29 16:10 drivers/input/touchscreen/ads7846.c:705:24: warning: taking address of packed member 'data' of class or structure 'ads7846_buf' may result in an unaligned pointer value kernel test robot
2022-01-29 16:10 ` kernel test robot
2022-01-29 16:10 ` kernel test robot
2022-01-29 20:30 ` Nathan Chancellor [this message]
2022-01-29 20:30 ` Nathan Chancellor
-- strict thread matches above, loose matches on Subject: below --
2021-12-26 2:58 kernel test robot
2021-12-26 2:58 ` kernel test robot
2021-12-26 2:58 ` kernel test robot
2021-07-01 19:21 kernel test robot
2021-07-01 19:21 ` kernel test robot
2021-05-03 23:16 kernel test robot
2021-05-03 23:16 ` kernel test robot
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