tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-4.19 head: 930de90fa348e756eb438c6e3e875c75eace3a49 commit: 930de90fa348e756eb438c6e3e875c75eace3a49 [2/2] CHROMIUM: img: Dump mfg_top registers when power fail config: arm64-chromiumos-mediatek-customedconfig-chrome-os:chromeos-4.19:930de90fa348e756eb438c6e3e875c75eace3a49 (attached as .config) compiler: aarch64-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 git remote add chrome-os https://chromium.googlesource.com/chromiumos/third_party/kernel git fetch --no-tags chrome-os chromeos-4.19 git checkout 930de90fa348e756eb438c6e3e875c75eace3a49 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 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 errors (new ones prefixed by >>): In file included from include/linux/printk.h:7, from include/linux/kernel.h:14, from include/linux/clk.h:16, from drivers/gpu/drm/img-rogue/1.10/mt8173/mt8173_mfgsys.c:15: drivers/gpu/drm/img-rogue/1.10/mt8173/mt8173_mfgsys.c: In function 'dump_range': 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/kern_levels.h:14:19: note: in expansion of macro 'KERN_SOH' 14 | #define KERN_INFO KERN_SOH "6" /* informational */ | ^~~~~~~~ include/linux/printk.h:310:9: note: in expansion of macro 'KERN_INFO' 310 | printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~~ drivers/gpu/drm/img-rogue/1.10/mt8173/mt8173_mfgsys.c:416:2: note: in expansion of macro 'pr_info' 416 | pr_info("%s: 0x%08x +0x%x\n", __func__, reg, len); | ^~~~~~~ drivers/gpu/drm/img-rogue/1.10/mt8173/mt8173_mfgsys.c:416:20: note: format string is defined here 416 | pr_info("%s: 0x%08x +0x%x\n", __func__, reg, len); | ~~~^ | | | unsigned int | %08lx In file included from include/linux/printk.h:7, from include/linux/kernel.h:14, from include/linux/clk.h:16, from drivers/gpu/drm/img-rogue/1.10/mt8173/mt8173_mfgsys.c:15: 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/kern_levels.h:14:19: note: in expansion of macro 'KERN_SOH' 14 | #define KERN_INFO KERN_SOH "6" /* informational */ | ^~~~~~~~ include/linux/printk.h:310:9: note: in expansion of macro 'KERN_INFO' 310 | printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~~ drivers/gpu/drm/img-rogue/1.10/mt8173/mt8173_mfgsys.c:416:2: note: in expansion of macro 'pr_info' 416 | pr_info("%s: 0x%08x +0x%x\n", __func__, reg, len); | ^~~~~~~ drivers/gpu/drm/img-rogue/1.10/mt8173/mt8173_mfgsys.c:416:26: note: format string is defined here 416 | pr_info("%s: 0x%08x +0x%x\n", __func__, reg, len); | ~^ | | | unsigned int | %lx cc1: all warnings being treated as errors 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 :::::: The code at line 5 was first introduced by commit :::::: 04d2c8c83d0e3ac5f78aeede51babb3236200112 printk: convert the format for KERN_<LEVEL> to a 2 byte pattern :::::: TO: Joe Perches <joe(a)perches.com&gt; :::::: CC: Linus Torvalds <torvalds(a)linux-foundation.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org