Hi Gabriel,

I love your patch! Yet something to improve:

[auto build test ERROR on ext3/fsnotify]
[also build test ERROR on linus/master v5.13-rc6 next-20210615]
[cannot apply to ext4/dev]
[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/20210616-155248
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs.git fsnotify
config: m68k-allmodconfig (attached as .config)
compiler: m68k-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/cefa2ac082849b4b7bb22317625cf3371a52faaf
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Gabriel-Krisman-Bertazi/File-system-wide-monitoring/20210616-155248
        git checkout cefa2ac082849b4b7bb22317625cf3371a52faaf
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=m68k 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All errors (new ones prefixed by >>):

quoted

samples/fanotify/fs-monitor.c:7:10: fatal error: errno.h: No such file or directory

       7 | #include <errno.h>
         |          ^~~~~~~~~
   compilation terminated.


vim +7 samples/fanotify/fs-monitor.c

   > 7	#include <errno.h>
     8	#include <err.h>
     9	#include <stdlib.h>
    10	#include <stdio.h>
    11	#include <fcntl.h>
    12	#include <sys/fanotify.h>
    13	#include <sys/types.h>
    14	#include <unistd.h>
    15	#include <sys/stat.h>
    16	#include <sys/types.h>
    17	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org