linux-ext4 - Re: [PATCH v3 14/15] samples: Add fs error monitoring example

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Date:   Tue, 20 Jul 2021 22:49:55 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Gabriel Krisman Bertazi <krisman@...labora.com>,
        Rong Chen <rong.a.chen@...el.com>
Cc:     kernel test robot <lkp@...el.com>, amir73il@...il.com,
        kbuild-all@...ts.01.org, djwong@...nel.org, tytso@....edu,
        david@...morbit.com, jack@...e.com, dhowells@...hat.com,
        khazhy@...gle.com, linux-fsdevel@...r.kernel.org,
        linux-ext4@...r.kernel.org
Subject: Re: [PATCH v3 14/15] samples: Add fs error monitoring example


On Mon, Jul 19, 2021 at 10:36:54AM -0400, Gabriel Krisman Bertazi wrote:
> kernel test robot <lkp@...el.com> writes:
> 
> > Hi Gabriel,
> >
> > I love your patch! Yet something to improve:
> >
> > [auto build test ERROR on ext3/fsnotify]
> > [also build test ERROR on ext4/dev linus/master v5.13 next-20210629]
> > [cannot apply to tytso-fscrypt/master]
> > [If your patch is applied to the wrong git tree, kindly drop us a note.
> > And when submitting patch, we suggest to use '--base' as documented in
> > https://git-scm.com/docs/git-format-patch ]
> >
> > url:    https://github.com/0day-ci/linux/commits/Gabriel-Krisman-Bertazi/File-system-wide-monitoring/20210630-031347 
> > base:   https://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs.git  fsnotify
> > config: arm64-allyesconfig (attached as .config)
> > compiler: aarch64-linux-gcc (GCC) 9.3.0
> > 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
> >         # https://github.com/0day-ci/linux/commit/746524d8db08a041fed90e41b15c8e8ca69cb22d 
> >         git remote add linux-review https://github.com/0day-ci/linux 
> >         git fetch --no-tags linux-review Gabriel-Krisman-Bertazi/File-system-wide-monitoring/20210630-031347
> >         git checkout 746524d8db08a041fed90e41b15c8e8ca69cb22d
> >         # save the attached .config to linux build tree
> >         mkdir build_dir
> >         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash samples/
> >
> > If you fix the issue, kindly add following tag as appropriate
> > Reported-by: kernel test robot <lkp@...el.com>
> >
> > All errors (new ones prefixed by >>):
> >
> >>> samples/fanotify/fs-monitor.c:7:10: fatal error: errno.h: No such file or directory
> >        7 | #include <errno.h>
> >          |          ^~~~~~~~~
> >    compilation terminated.
> 
> Hi Dan,
> 
> I'm not sure what's the proper fix here.  Looks like 0day is not using
> cross system libraries when building this user space code.  Should I do
> something special to silent it?

I'm not the person to ask, I just look at Smatch warnings.  Rong Chen
might know the answer.

regards,
dan carpenter