Hi Vladimir,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on net/master]

url:    https://github.com/0day-ci/linux/commits/Vladimir-Oltean/net-stmmac-retain-PTP-clock-time-during-SIOCSHWTSTAMP-ioctls/20211120-070717
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git 0f296e782f21dc1c55475a3c107ac68ab09cc1cf
config: arm64-defconfig (attached as .config)
compiler: aarch64-linux-gcc (GCC) 11.2.0
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/176142cdd6854119eb07a8caf8c2808d7d490637
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Vladimir-Oltean/net-stmmac-retain-PTP-clock-time-during-SIOCSHWTSTAMP-ioctls/20211120-070717
        git checkout 176142cdd6854119eb07a8caf8c2808d7d490637
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arm64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>, old ones prefixed by <<):

>> ERROR: modpost: "stmmac_init_tstamp_counter" [drivers/net/ethernet/stmicro/stmmac/stmmac-platform.ko] undefined!

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