tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: c7d4c1fd91ab4a6d2620497921a9c6bf54650ab8 commit: 3bbfe9871005f38df2955b2e125933edf1d2feef [4273/10489] firmware: arm_ffa: Add initial Arm FFA driver support config: arm64-randconfig-r024-20210617 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 64720f57bea6a6bf033feef4a5751ab9c0c3b401) 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 # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 3bbfe9871005f38df2955b2e125933edf1d2feef # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 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 >>): vim +123 drivers/firmware/arm_ffa/driver.c 110 111 #define SENDER_ID_MASK GENMASK(31, 16) 112 #define RECEIVER_ID_MASK GENMASK(15, 0) 113 #define SENDER_ID(x) ((u16)(FIELD_GET(SENDER_ID_MASK, (x)))) 114 #define RECEIVER_ID(x) ((u16)(FIELD_GET(RECEIVER_ID_MASK, (x)))) 115 #define PACK_TARGET_INFO(s, r) \ 116 (FIELD_PREP(SENDER_ID_MASK, (s)) | FIELD_PREP(RECEIVER_ID_MASK, (r))) 117 118 /** 119 * FF-A specification mentions explicitly about '4K pages'. This should 120 * not be confused with the kernel PAGE_SIZE, which is the translation 121 * granule kernel is configured and may be one among 4K, 16K and 64K. 122 */ 124 /* 125 * Keeping RX TX buffer size as 4K for now 126 * 64K may be preferred to keep it min a page in 64K PAGE_SIZE config 127 */ 128 #define RXTX_BUFFER_SIZE SZ_4K 129 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org