tree: https://git.kernel.org/pub/scm/linux/kernel/git/jpoimboe/linux.git objtool-test head: 14d7c68274f2a17d5734c87971f08cd08cf862c6 commit: 14d7c68274f2a17d5734c87971f08cd08cf862c6 [1/1] objtool: prefer memory clobber & %= to volatile & __COUNTER__ config: x86_64-rhel-8.3 (https://download.01.org/0day-ci/archive/20220119/202201190632.lhlaiCBk-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/jpoimboe/linux.git/commit... git remote add jpoimboe https://git.kernel.org/pub/scm/linux/kernel/git/jpoimboe/linux.git git fetch --no-tags jpoimboe objtool-test git checkout 14d7c68274f2a17d5734c87971f08cd08cf862c6 # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/media/ mm// If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org