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Date:   Mon, 19 Jul 2021 10:36:54 -0400
From:   Gabriel Krisman Bertazi <>
To:     kernel test robot <>,
        Dan Carpenter <>
Subject: Re: [PATCH v3 14/15] samples: Add fs error monitoring example

kernel test robot <> 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
> url:
> base: fsnotify
> config: arm64-allyesconfig (attached as .config)
> compiler: aarch64-linux-gcc (GCC) 9.3.0
> reproduce (this is a W=1 build):
>         wget -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         #
>         git remote add linux-review
>         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 <>
> 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?

Gabriel Krisman Bertazi

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