[kbuild-all] [jimc:dyn-drm-trc 17/19] lib/dynamic_debug.c:874:15: error: variable 'flags' set but not used

tree: https://github.com/jimc/linux.git dyn-drm-trc head: df426d10840ccdda8ef29b66f8df55a010836a7c commit: 8931711b03d17ea34bc44b6fa6c8b6296266b951 [17/19] dyndbg: issue trace-events from pr_debug, dev_dbg config: riscv-randconfig-c006-20220213 (https://download.01.org/0day-ci/archive/20220213/202202132018.JLgM43hK-lk...) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 478c237e21b2c3a83e46f26fcbeb3876682f9b14) 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 # install riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://github.com/jimc/linux/commit/8931711b03d17ea34bc44b6fa6c8b6296266... git remote add jimc https://github.com/jimc/linux.git git fetch --no-tags jimc dyn-drm-trc git checkout 8931711b03d17ea34bc44b6fa6c8b6296266b951 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash 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 >>): unsigned int flags; ^ 1 error generated. vim +/flags +874 lib/dynamic_debug.c 0feefd97861f9b Jason Baron 2011-10-04 869 906d201530f2c5 Joe Perches 2014-09-24 870 void __dynamic_netdev_dbg(struct _ddebug *descriptor, ffa10cb47a94c9 Jason Baron 2011-08-11 871 const struct net_device *dev, const char *fmt, ...) ffa10cb47a94c9 Jason Baron 2011-08-11 872 { ffa10cb47a94c9 Jason Baron 2011-08-11 873 struct va_format vaf; 55bd43faa7bd6f Jim Cromie 2021-11-22 @874 unsigned int flags; ffa10cb47a94c9 Jason Baron 2011-08-11 875 va_list args; ffa10cb47a94c9 Jason Baron 2011-08-11 876 ffa10cb47a94c9 Jason Baron 2011-08-11 877 BUG_ON(!descriptor); ffa10cb47a94c9 Jason Baron 2011-08-11 878 BUG_ON(!fmt); ffa10cb47a94c9 Jason Baron 2011-08-11 879 ffa10cb47a94c9 Jason Baron 2011-08-11 880 va_start(args, fmt); b004ff4972e2a4 Joe Perches 2012-09-12 881 ffa10cb47a94c9 Jason Baron 2011-08-11 882 vaf.fmt = fmt; ffa10cb47a94c9 Jason Baron 2011-08-11 883 vaf.va = &args; 55bd43faa7bd6f Jim Cromie 2021-11-22 884 flags = descriptor->flags; b004ff4972e2a4 Joe Perches 2012-09-12 885 b004ff4972e2a4 Joe Perches 2012-09-12 886 if (dev && dev->dev.parent) { 640d1eaff2c09e Jim Cromie 2021-05-04 887 char buf[PREFIX_SIZE] = ""; b004ff4972e2a4 Joe Perches 2012-09-12 888 8931711b03d17e Jim Cromie 2021-12-01 889 ddebug_dev_printk(descriptor, dev->dev.parent, ccc7f4968a18b9 Veaceslav Falico 2014-07-17 890 "%s%s %s %s%s: %pV", b004ff4972e2a4 Joe Perches 2012-09-12 891 dynamic_emit_prefix(descriptor, buf), b004ff4972e2a4 Joe Perches 2012-09-12 892 dev_driver_string(dev->dev.parent), b004ff4972e2a4 Joe Perches 2012-09-12 893 dev_name(dev->dev.parent), ccc7f4968a18b9 Veaceslav Falico 2014-07-17 894 netdev_name(dev), netdev_reg_state(dev), ccc7f4968a18b9 Veaceslav Falico 2014-07-17 895 &vaf); b004ff4972e2a4 Joe Perches 2012-09-12 896 } else if (dev) { 8931711b03d17e Jim Cromie 2021-12-01 897 ddebug_dev_printk(descriptor, &dev->dev, KERN_DEBUG "%s%s: %pV", 55bd43faa7bd6f Jim Cromie 2021-11-22 898 netdev_name(dev), netdev_reg_state(dev), &vaf); b004ff4972e2a4 Joe Perches 2012-09-12 899 } else { 8931711b03d17e Jim Cromie 2021-12-01 900 ddebug_printk(descriptor, KERN_DEBUG "(NULL net_device): %pV", &vaf); b004ff4972e2a4 Joe Perches 2012-09-12 901 } b004ff4972e2a4 Joe Perches 2012-09-12 902 ffa10cb47a94c9 Jason Baron 2011-08-11 903 va_end(args); ffa10cb47a94c9 Jason Baron 2011-08-11 904 } ffa10cb47a94c9 Jason Baron 2011-08-11 905 EXPORT_SYMBOL(__dynamic_netdev_dbg); ffa10cb47a94c9 Jason Baron 2011-08-11 906 :::::: The code at line 874 was first introduced by commit :::::: 55bd43faa7bd6fe653d8b401414961a35bcd9151 dyndbg: add write-events-to-tracefs code :::::: TO: Jim Cromie <jim.cromie(a)gmail.com&gt; :::::: CC: Jim Cromie <jim.cromie(a)gmail.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org