Hi "Isaac, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on iommu/next] [also build test WARNING on soc/for-next xlnx/master linus/master v5.10 next-20201223] [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/Isaac-J-Manjarres/iommu-Permit-modular-builds-of-io-pgtable-drivers/20201222-085121 base: https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next config: alpha-randconfig-r023-20201221 (attached as .config) compiler: alpha-linux-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/9cc3cfc5f79e5c9072aea2218dd9080227933caa git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Isaac-J-Manjarres/iommu-Permit-modular-builds-of-io-pgtable-drivers/20201222-085121 git checkout 9cc3cfc5f79e5c9072aea2218dd9080227933caa # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): In file included from include/linux/printk.h:7, from include/linux/kernel.h:16, from include/asm-generic/bug.h:20, from arch/alpha/include/asm/bug.h:23, from include/linux/bug.h:5, from include/linux/scatterlist.h:7, from include/linux/iommu.h:10, from include/linux/io-pgtable.h:6, from drivers/iommu/io-pgtable-arm.c:14: drivers/iommu/io-pgtable-arm.c: In function 'arm_lpae_init': >> include/linux/kern_levels.h:5:18: warning: format '%d' expects a matching 'int' argument [-Wformat=] 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/kern_levels.h:11:18: note: in expansion of macro 'KERN_SOH' 11 | #define KERN_ERR KERN_SOH "3" /* error conditions */ | ^~~~~~~~ include/linux/printk.h:343:9: note: in expansion of macro 'KERN_ERR' 343 | printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~ drivers/iommu/io-pgtable-arm.c:1257:4: note: in expansion of macro 'pr_err' 1257 | pr_err("Failed to register ARM LPAE fmt: %d\n"); | ^~~~~~ drivers/iommu/io-pgtable-arm.c:1257:46: note: format string is defined here 1257 | pr_err("Failed to register ARM LPAE fmt: %d\n"); | ~^ | | | int vim +5 include/linux/kern_levels.h 314ba3520e513a7 Joe Perches 2012-07-30 4 04d2c8c83d0e3ac Joe Perches 2012-07-30 @5 #define KERN_SOH "\001" /* ASCII Start Of Header */ 04d2c8c83d0e3ac Joe Perches 2012-07-30 6 #define KERN_SOH_ASCII '\001' 04d2c8c83d0e3ac Joe Perches 2012-07-30 7 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org