Hi Zong, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on vkoul-dmaengine/next] [also build test WARNING on v5.16] [cannot apply to robh/for-next next-20220114] [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/Zong-Li/Determine-the-number-of-... base: https://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine.git next config: riscv-allmodconfig (https://download.01.org/0day-ci/archive/20220115/202201150140.AnHdUdow-lk...) compiler: riscv64-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/efa33512fd463fd6e29750992df1d4051... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Zong-Li/Determine-the-number-of-DMA-channels-by-dma-channels-property/20220114-172017 git checkout efa33512fd463fd6e29750992df1d40513eb5a7c # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=riscv SHELL=/bin/bash 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 >>): In file included from include/linux/compiler_types.h:85, from <command-line>: arch/riscv/include/asm/jump_label.h: In function 'vchan_cookie_complete': 86 | #define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0) | ^~~ arch/riscv/include/asm/jump_label.h:20:9: note: in expansion of macro 'asm_volatile_goto' 20 | asm_volatile_goto( | ^~~~~~~~~~~~~~~~~ include/linux/compiler-gcc.h:86:38: error: impossible constraint in 'asm' 86 | #define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0) | ^~~ arch/riscv/include/asm/jump_label.h:20:9: note: in expansion of macro 'asm_volatile_goto' 20 | asm_volatile_goto( | ^~~~~~~~~~~~~~~~~ vim +/asm +86 include/linux/compiler-gcc.h 313dd1b629219d Kees Cook 2017-05-05 76 cb984d101b30eb Joe Perches 2015-06-25 77 /* cb984d101b30eb Joe Perches 2015-06-25 78 * GCC 'asm goto' miscompiles certain code sequences: cb984d101b30eb Joe Perches 2015-06-25 79 * cb984d101b30eb Joe Perches 2015-06-25 80 * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670 cb984d101b30eb Joe Perches 2015-06-25 81 * cb984d101b30eb Joe Perches 2015-06-25 82 * Work it around via a compiler barrier quirk suggested by Jakub Jelinek. cb984d101b30eb Joe Perches 2015-06-25 83 * cb984d101b30eb Joe Perches 2015-06-25 84 * (asm goto is automatically volatile - the naming reflects this.) cb984d101b30eb Joe Perches 2015-06-25 85 */ cb984d101b30eb Joe Perches 2015-06-25 @86 #define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0) cb984d101b30eb Joe Perches 2015-06-25 87 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org