From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: kernel test robot <lkp@intel.com>
Cc: Sakari Ailus <sakari.ailus@linux.intel.com>,
llvm@lists.linux.dev, kbuild-all@lists.01.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
Petr Mladek <pmladek@suse.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Subject: Re: drivers/media/v4l2-core/v4l2-ioctl.c:303:28: warning: taking address of packed member 'pixelformat' of class or structure 'v4l2_pix_format_mplane' may result in an unaligned pointer value
Date: Fri, 5 Nov 2021 12:21:48 +0200 [thread overview]
Message-ID: <CAHp75Ve=ByJ+KMFXsH6sYQeM+FAzgYBX80TqdVfb5_YFLX3sdw@mail.gmail.com> (raw)
In-Reply-To: <202111050644.9HQjbpIQ-lkp@intel.com>
On Fri, Nov 5, 2021 at 12:24 AM kernel test robot <lkp@intel.com> wrote:
>
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: c1e2e0350ce37f633b5ce3ce1cdf4428513fc2a2
> commit: e927e1e0f0dd3e353d5556503a71484008692c82 v4l: ioctl: Use %p4cc printk modifier to print FourCC codes
> date: 9 months ago
> config: mips-randconfig-r011-20211101 (attached as .config)
> compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 82ed106567063ea269c6d5669278b733e173a42f)
> 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=e927e1e0f0dd3e353d5556503a71484008692c82
> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> git fetch --no-tags linus master
> git checkout e927e1e0f0dd3e353d5556503a71484008692c82
> # save the attached .config to linux build tree
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=mips
>
> 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/media/v4l2-core/v4l2-ioctl.c:303:28: warning: taking address of packed member 'pixelformat' of class or structure 'v4l2_pix_format_mplane' may result in an unaligned pointer value [-Waddress-of-packed-member]
Yeah, I discussed it with Sakari a few months ago. Dunno what is the outcome.
TL;DR: some are easy to fix, i.e. by dropping __packed, the rest needs
more thinking...
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2021-11-05 10:22 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-04 22:21 drivers/media/v4l2-core/v4l2-ioctl.c:303:28: warning: taking address of packed member 'pixelformat' of class or structure 'v4l2_pix_format_mplane' may result in an unaligned pointer value kernel test robot
2021-11-05 10:21 ` Andy Shevchenko [this message]
-- strict thread matches above, loose matches on Subject: below --
2022-01-17 3:40 kernel test robot
2022-01-08 10:33 kernel test robot
2022-01-09 14:26 ` Andy Shevchenko
2022-01-10 19:44 ` Nick Desaulniers
2022-01-10 20:49 ` Andy Shevchenko
2022-01-10 21:22 ` Nick Desaulniers
2021-07-14 17:55 kernel test robot
2021-07-14 19:45 ` Andy Shevchenko
2021-07-16 11:41 ` Sakari Ailus
2021-07-16 12:12 ` Andy Shevchenko
2021-08-19 8:10 ` Sakari Ailus
2021-08-26 13:22 ` Petr Mladek
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CAHp75Ve=ByJ+KMFXsH6sYQeM+FAzgYBX80TqdVfb5_YFLX3sdw@mail.gmail.com' \
--to=andy.shevchenko@gmail.com \
--cc=andriy.shevchenko@linux.intel.com \
--cc=kbuild-all@lists.01.org \
--cc=linux-kernel@vger.kernel.org \
--cc=lkp@intel.com \
--cc=llvm@lists.linux.dev \
--cc=pmladek@suse.com \
--cc=sakari.ailus@linux.intel.com \
--cc=tzimmermann@suse.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).