Hi Tiezhu, Thank you for the patch! Yet something to improve: [auto build test ERROR on bpf-next/master] [also build test ERROR on bpf/master linus/master v5.11-rc3 next-20210113] [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/Tiezhu-Yang/Fix-build-errors-and... base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: arm-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/f65413b91d3c20f52eb8b53d7d32b9fd3... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Tiezhu-Yang/Fix-build-errors-and-warnings-when-make-M-samples-bpf/20210113-190045 git checkout f65413b91d3c20f52eb8b53d7d32b9fd38a18dca # 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 <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from include/linux/spinlock_types.h:13, from include/linux/ratelimit_types.h:7, from include/linux/ratelimit.h:5, from lib/ratelimit.c:11: 13 | u32 slock; | ^~~ 19 | u16 owner; | ^~~ arch/arm/include/asm/spinlock_types.h:20:4: error: unknown type name 'u16' 20 | u16 next; | ^~~ arch/arm/include/asm/spinlock_types.h:29:2: error: unknown type name 'u32' 29 | u32 lock; | ^~~ vim +/u32 +13 arch/arm/include/asm/spinlock_types.h 546c2896a42202db arch/arm/include/asm/spinlock_types.h Will Deacon 2012-07-06 10 fb1c8f93d869b34c include/asm-arm/spinlock_types.h Ingo Molnar 2005-09-10 11 typedef struct { 546c2896a42202db arch/arm/include/asm/spinlock_types.h Will Deacon 2012-07-06 12 union { 546c2896a42202db arch/arm/include/asm/spinlock_types.h Will Deacon 2012-07-06 @13 u32 slock; 546c2896a42202db arch/arm/include/asm/spinlock_types.h Will Deacon 2012-07-06 14 struct __raw_tickets { 546c2896a42202db arch/arm/include/asm/spinlock_types.h Will Deacon 2012-07-06 15 #ifdef __ARMEB__ 546c2896a42202db arch/arm/include/asm/spinlock_types.h Will Deacon 2012-07-06 16 u16 next; 546c2896a42202db arch/arm/include/asm/spinlock_types.h Will Deacon 2012-07-06 17 u16 owner; 546c2896a42202db arch/arm/include/asm/spinlock_types.h Will Deacon 2012-07-06 18 #else 546c2896a42202db arch/arm/include/asm/spinlock_types.h Will Deacon 2012-07-06 @19 u16 owner; 546c2896a42202db arch/arm/include/asm/spinlock_types.h Will Deacon 2012-07-06 20 u16 next; 546c2896a42202db arch/arm/include/asm/spinlock_types.h Will Deacon 2012-07-06 21 #endif 546c2896a42202db arch/arm/include/asm/spinlock_types.h Will Deacon 2012-07-06 22 } tickets; 546c2896a42202db arch/arm/include/asm/spinlock_types.h Will Deacon 2012-07-06 23 }; 445c89514be242b1 arch/arm/include/asm/spinlock_types.h Thomas Gleixner 2009-12-02 24 } arch_spinlock_t; fb1c8f93d869b34c include/asm-arm/spinlock_types.h Ingo Molnar 2005-09-10 25 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org