tree: https://github.com/jimc/linux.git dd-drm-next head: 02a6c357b6a5eb02cc6b2ceb5a7a93c809388ae0 commit: 74992de06222ed51caed07800e291e68eb4a627e [3/16] dyndbg: rationalize verbosity config: hexagon-randconfig-r034-20210911 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 261cbe98c38f8c1ee1a482fe76511110e790f58a) 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/jimc/linux/commit/74992de06222ed51caed07800e291e68eb4a... git remote add jimc https://github.com/jimc/linux.git git fetch --no-tags jimc dd-drm-next git checkout 74992de06222ed51caed07800e291e68eb4a627e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=hexagon 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 >>): v2pr_info("read %lu bytes from userspace <\n%s>\n", len, tmpbuf); ~~~ ^~~ %u lib/dynamic_debug.c:120:49: note: expanded from macro 'v2pr_info' #define v2pr_info(fmt, ...) vnpr_info(2, fmt, ##__VA_ARGS__) ~~~ ^~~~~~~~~~~ lib/dynamic_debug.c:116:18: note: expanded from macro 'vnpr_info' pr_info(fmt, ##__VA_ARGS__); \ ~~~ ^~~~~~~~~~~ include/linux/printk.h:420:34: note: expanded from macro 'pr_info' printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) ~~~ ^~~~~~~~~~~ 1 warning generated. vim +786 lib/dynamic_debug.c 765 766 /* 767 * File_ops->write method for <debugfs>/dynamic_debug/control. Gathers the 768 * command text from userspace, parses and executes it. 769 */ 770 #define USER_BUF_PAGE 4096 771 static ssize_t ddebug_proc_write(struct file *file, const char __user *ubuf, 772 size_t len, loff_t *offp) 773 { 774 char *tmpbuf; 775 int ret; 776 777 if (len == 0) 778 return 0; 779 if (len > USER_BUF_PAGE - 1) { 780 pr_warn("expected <%d bytes into control\n", USER_BUF_PAGE); 781 return -E2BIG; 782 } 783 tmpbuf = memdup_user_nul(ubuf, len); 784 if (IS_ERR(tmpbuf)) 785 return PTR_ERR(tmpbuf); 787 788 ret = ddebug_exec_queries(tmpbuf, NULL); 789 kfree(tmpbuf); 790 if (ret < 0) 791 return ret; 792 793 *offp += len; 794 return len; 795 } 796 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org