Hi Alexandre, I love your patch! Yet something to improve: [auto build test ERROR on abelloni/rtc-next] [also build test ERROR on stm32/stm32-next linux/master linus/master v5.11-rc4 next-20210120] [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/Alexandre-Belloni/rtc-ac100-use-rtc_lock-rtc_unlock/20210120-172843 base: https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git rtc-next config: arm-sunxi_defconfig (attached as .config) compiler: arm-linux-gnueabi-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/b6052366a7328ef9db6ad0d0fc7ea94e542a6f05 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Alexandre-Belloni/rtc-ac100-use-rtc_lock-rtc_unlock/20210120-172843 git checkout b6052366a7328ef9db6ad0d0fc7ea94e542a6f05 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): In file included from drivers/rtc/rtc-ac100.c:21: drivers/rtc/rtc-ac100.c: In function 'ac100_rtc_irq': >> include/linux/rtc.h:165:32: error: lvalue required as unary '&' operand 165 | #define rtc_lock(d) mutex_lock(&d->ops_lock) | ^ drivers/rtc/rtc-ac100.c:531:2: note: in expansion of macro 'rtc_lock' 531 | rtc_lock(&chip->rtc); | ^~~~~~~~ include/linux/rtc.h:166:36: error: lvalue required as unary '&' operand 166 | #define rtc_unlock(d) mutex_unlock(&d->ops_lock) | ^ drivers/rtc/rtc-ac100.c:554:2: note: in expansion of macro 'rtc_unlock' 554 | rtc_unlock(&chip->rtc); | ^~~~~~~~~~ vim +165 include/linux/rtc.h 0c86edc0d4970649 Alessandro Zummo 2006-03-27 164 ae48668843382593 Alexandre Belloni 2019-10-19 @165 #define rtc_lock(d) mutex_lock(&d->ops_lock) ae48668843382593 Alexandre Belloni 2019-10-19 166 #define rtc_unlock(d) mutex_unlock(&d->ops_lock) ae48668843382593 Alexandre Belloni 2019-10-19 167 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org