tree: git://git.ragnatech.se/linux media-tree head: c4176e12a755d0c761736c14bd2656ffc733eb95 commit: f90cf6079bf67988f8b1ad1ade70fc89d0080905 [319/322] media: vidtv: add a bridge driver config: nios2-randconfig-r002-20200913 (attached as .config) compiler: nios2-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 checkout f90cf6079bf67988f8b1ad1ade70fc89d0080905 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=nios2 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 drivers/media/test-drivers/vidtv/vidtv_common.c:11: drivers/media/test-drivers/vidtv/vidtv_common.c: In function 'vidtv_memcpy': 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/printk.h:508:10: note: in definition of macro 'printk_ratelimited' 508 | printk(fmt, ##__VA_ARGS__); \ | ^~~ 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:522:21: note: in expansion of macro 'KERN_ERR' 522 | printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~ drivers/media/test-drivers/vidtv/vidtv_common.c:45:3: note: in expansion of macro 'pr_err_ratelimited' 45 | pr_err_ratelimited("overflow detected, skipping. Try increasing the buffer size. Needed %lu, had %zu\n", | ^~~~~~~~~~~~~~~~~~ drivers/media/test-drivers/vidtv/vidtv_common.c: In function 'vidtv_memset': 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/printk.h:508:10: note: in definition of macro 'printk_ratelimited' 508 | printk(fmt, ##__VA_ARGS__); \ | ^~~ 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:522:21: note: in expansion of macro 'KERN_ERR' 522 | printk_ratelimited(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~ drivers/media/test-drivers/vidtv/vidtv_common.c:81:3: note: in expansion of macro 'pr_err_ratelimited' 81 | pr_err_ratelimited("overflow detected, skipping. Try increasing the buffer size. Needed %lu, had %zu\n", | ^~~~~~~~~~~~~~~~~~ -- In file included from include/linux/ratelimit_types.h:5, from include/linux/printk.h:10, from drivers/media/test-drivers/vidtv/vidtv_pes.c:17: drivers/media/test-drivers/vidtv/vidtv_pes.c: In function 'vidtv_pes_write_pts_dts': 36 | (~UL(0) >> (BITS_PER_LONG - 1 - (h)))) | ^~ include/linux/bits.h:38:31: note: in expansion of macro '__GENMASK' 38 | (GENMASK_INPUT_CHECK(h, l) + __GENMASK(h, l)) | ^~~~~~~~~ drivers/media/test-drivers/vidtv/vidtv_pes.c:98:10: note: in expansion of macro 'GENMASK' 98 | mask1 = GENMASK(32, 30); | ^~~~~~~ -- In file included from include/linux/kernel.h:15, from include/asm-generic/bug.h:20, from ./arch/nios2/include/generated/asm/bug.h:1, from include/linux/bug.h:5, from include/linux/mmdebug.h:5, from include/linux/gfp.h:5, from include/linux/slab.h:15, from drivers/media/test-drivers/vidtv/vidtv_s302m.c:21: drivers/media/test-drivers/vidtv/vidtv_s302m.c: In function 'vidtv_s302m_write_frames': 5 | #define KERN_SOH "\001" /* ASCII Start Of Header */ | ^~~~~~ include/linux/printk.h:508:10: note: in definition of macro 'printk_ratelimited' 508 | printk(fmt, ##__VA_ARGS__); \ | ^~~ include/linux/kern_levels.h:12:22: note: in expansion of macro 'KERN_SOH' 12 | #define KERN_WARNING KERN_SOH "4" /* warning conditions */ | ^~~~~~~~ include/linux/printk.h:524:21: note: in expansion of macro 'KERN_WARNING' 524 | printk_ratelimited(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~~~~~~ drivers/media/test-drivers/vidtv/vidtv_s302m.c:425:4: note: in expansion of macro 'pr_warn_ratelimited' 425 | pr_warn_ratelimited("write size was %d, expected %lu\n", | ^~~~~~~~~~~~~~~~~~~ git remote add ragnatech git://git.ragnatech.se/linux git fetch --no-tags ragnatech media-tree git checkout f90cf6079bf67988f8b1ad1ade70fc89d0080905 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