tree: https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs-stable.git linux-4.19.y head: 010b090e4e64913748f16c28168be674a4139e14 commit: 0f87f20d0536ae21524ce1c25335aec991229114 [482/754] f2fs: fix to check i_compr_blocks correctly config: microblaze-randconfig-r011-20210113 (attached as .config) compiler: microblaze-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://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs-stable.git/c... git remote add f2fs-stable https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs-stable.git git fetch --no-tags f2fs-stable linux-4.19.y git checkout 0f87f20d0536ae21524ce1c25335aec991229114 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=microblaze 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 fs/f2fs/inode.c:14: fs/f2fs/f2fs.h: In function 'blkaddr_in_node': fs/f2fs/f2fs.h:2377:30: warning: taking address of packed member of 'struct f2fs_inode' may result in an unaligned pointer value [-Waddress-of-packed-member] 2377 | return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr; | ^~~~ fs/f2fs/f2fs.h:2377:47: warning: taking address of packed member of 'struct direct_node' may result in an unaligned pointer value [-Waddress-of-packed-member] 2377 | return RAW_IS_INODE(node) ? node->i.i_addr : node->dn.addr; | ^~~~ In file included from include/linux/printk.h:7, from include/linux/kernel.h:14, from include/linux/list.h:9, from include/linux/wait.h:7, from include/linux/wait_bit.h:8, from include/linux/fs.h:6, from fs/f2fs/inode.c:8: fs/f2fs/inode.c: In function 'sanity_check_inode': 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/kern_levels.h:12:22: note: in expansion of macro 'KERN_SOH' 12 | #define KERN_WARNING KERN_SOH "4" /* warning conditions */ | ^~~~~~~~ fs/f2fs/f2fs.h:1949:19: note: in expansion of macro 'KERN_WARNING' 1949 | f2fs_printk(sbi, KERN_WARNING fmt, ##__VA_ARGS__) | ^~~~~~~~~~~~ fs/f2fs/inode.c:303:4: note: in expansion of macro 'f2fs_warn' 303 | f2fs_warn(sbi, "%s: inode (ino=%lx) has inconsistent " | ^~~~~~~~~ fs/f2fs/inode.c:304:38: note: format string is defined here 304 | "i_compr_blocks:%llu, i_blocks:%lu, run fsck to fix", | ~~^ | | | long unsigned int | %llu vim +5 include/linux/kern_levels.h 314ba3520e513a78 Joe Perches 2012-07-30 4 04d2c8c83d0e3ac5 Joe Perches 2012-07-30 @5 #define KERN_SOH "\001" /* ASCII Start Of Header */ 04d2c8c83d0e3ac5 Joe Perches 2012-07-30 6 #define KERN_SOH_ASCII '\001' 04d2c8c83d0e3ac5 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