Hi Sai, Thank you for the patch! Yet something to improve: [auto build test ERROR on next-20220115] [cannot apply to arm64/for-next/core arnd-asm-generic/master arm-perf/for-next/perf linus/master v5.16 v5.16-rc8 v5.16-rc7 v5.16] [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/Sai-Prakash-Ranjan/lib-rwmmio-ar... base: bd8d9cef2a7932e688ca267ea1adf5ea6557c777 config: nios2-defconfig (https://download.01.org/0day-ci/archive/20220116/202201160019.hrsMYj6V-lk...) compiler: nios2-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/0757812bba83a756f73ce1a84c86ded3e... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Sai-Prakash-Ranjan/lib-rwmmio-arm64-Add-support-to-trace-register-reads-writes/20220115-211708 git checkout 0757812bba83a756f73ce1a84c86ded3e276cd0f # 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=nios2 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 errors (new ones prefixed by >>): In file included from arch/nios2/include/asm/io.h:41, from include/linux/io.h:13, from arch/nios2/include/asm/pgtable.h:18, from include/linux/pgtable.h:6, from arch/nios2/kernel/nios2_ksyms.c:11: include/asm-generic/io.h: In function 'readb': 181 | log_read_mmio(8, addr, _THIS_IP_); | ^~~~~~~~~ include/asm-generic/io.h:181:32: note: each undeclared identifier is reported only once for each function it appears in include/asm-generic/io.h: In function 'readw': include/asm-generic/io.h:196:33: error: '_THIS_IP_' undeclared (first use in this function) 196 | log_read_mmio(16, addr, _THIS_IP_); | ^~~~~~~~~ include/asm-generic/io.h: In function 'readl': include/asm-generic/io.h:211:33: error: '_THIS_IP_' undeclared (first use in this function) 211 | log_read_mmio(32, addr, _THIS_IP_); | ^~~~~~~~~ include/asm-generic/io.h: In function 'writeb': include/asm-generic/io.h:241:40: error: '_THIS_IP_' undeclared (first use in this function) 241 | log_write_mmio(value, 8, addr, _THIS_IP_); | ^~~~~~~~~ include/asm-generic/io.h: In function 'writew': include/asm-generic/io.h:253:41: error: '_THIS_IP_' undeclared (first use in this function) 253 | log_write_mmio(value, 16, addr, _THIS_IP_); | ^~~~~~~~~ include/asm-generic/io.h: In function 'writel': include/asm-generic/io.h:265:41: error: '_THIS_IP_' undeclared (first use in this function) 265 | log_write_mmio(value, 32, addr, _THIS_IP_); | ^~~~~~~~~ vim +/_THIS_IP_ +181 include/asm-generic/io.h 169 170 /* 171 * {read,write}{b,w,l,q}() access little endian memory and return result in 172 * native endianness. 173 */ 174 175 #ifndef readb 176 #define readb readb 177 static inline u8 readb(const volatile void __iomem *addr) 178 { 179 u8 val; 180 182 __io_br(); 183 val = __raw_readb(addr); 184 __io_ar(val); 185 log_post_read_mmio(val, 8, addr, _THIS_IP_); 186 return val; 187 } 188 #endif 189 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org