tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 88fac11862d38306dd0d2398015744877140390d commit: 7bc04ce6b914a06d5823509d1de237787c58e649 [8078/10638] Makefile: Enable -Wimplicit-fallthrough for Clang config: mips-randconfig-c004-20210827 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 1076082a0d97bd5c16a25ee7cf3dbb6ee4b5a9fe) 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 mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=7bc04ce6b914a06d5823509d1de237787c58e649 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 7bc04ce6b914a06d5823509d1de237787c58e649 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> arch/mips/kernel/uprobes.c:176:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] default: ^ arch/mips/kernel/uprobes.c:176:2: note: insert 'break;' to avoid fall-through default: ^ break; 1 warning generated. vim +176 arch/mips/kernel/uprobes.c 40e084a506eba7 Ralf Baechle 2015-07-29 153 40e084a506eba7 Ralf Baechle 2015-07-29 154 int arch_uprobe_exception_notify(struct notifier_block *self, 40e084a506eba7 Ralf Baechle 2015-07-29 155 unsigned long val, void *data) 40e084a506eba7 Ralf Baechle 2015-07-29 156 { 40e084a506eba7 Ralf Baechle 2015-07-29 157 struct die_args *args = data; 40e084a506eba7 Ralf Baechle 2015-07-29 158 struct pt_regs *regs = args->regs; 40e084a506eba7 Ralf Baechle 2015-07-29 159 40e084a506eba7 Ralf Baechle 2015-07-29 160 /* regs == NULL is a kernel bug */ 40e084a506eba7 Ralf Baechle 2015-07-29 161 if (WARN_ON(!regs)) 40e084a506eba7 Ralf Baechle 2015-07-29 162 return NOTIFY_DONE; 40e084a506eba7 Ralf Baechle 2015-07-29 163 40e084a506eba7 Ralf Baechle 2015-07-29 164 /* We are only interested in userspace traps */ 40e084a506eba7 Ralf Baechle 2015-07-29 165 if (!user_mode(regs)) 40e084a506eba7 Ralf Baechle 2015-07-29 166 return NOTIFY_DONE; 40e084a506eba7 Ralf Baechle 2015-07-29 167 40e084a506eba7 Ralf Baechle 2015-07-29 168 switch (val) { 2809328f6ef213 Marcin Nowakowski 2016-08-11 169 case DIE_UPROBE: 40e084a506eba7 Ralf Baechle 2015-07-29 170 if (uprobe_pre_sstep_notifier(regs)) 40e084a506eba7 Ralf Baechle 2015-07-29 171 return NOTIFY_STOP; 40e084a506eba7 Ralf Baechle 2015-07-29 172 break; 40e084a506eba7 Ralf Baechle 2015-07-29 173 case DIE_UPROBE_XOL: 40e084a506eba7 Ralf Baechle 2015-07-29 174 if (uprobe_post_sstep_notifier(regs)) 40e084a506eba7 Ralf Baechle 2015-07-29 175 return NOTIFY_STOP; 40e084a506eba7 Ralf Baechle 2015-07-29 @176 default: 40e084a506eba7 Ralf Baechle 2015-07-29 177 break; 40e084a506eba7 Ralf Baechle 2015-07-29 178 } 40e084a506eba7 Ralf Baechle 2015-07-29 179 40e084a506eba7 Ralf Baechle 2015-07-29 180 return 0; 40e084a506eba7 Ralf Baechle 2015-07-29 181 } 40e084a506eba7 Ralf Baechle 2015-07-29 182 :::::: The code at line 176 was first introduced by commit :::::: 40e084a506eba78310cd5e8ab700fd1226c6130a MIPS: Add uprobes support. :::::: TO: Ralf Baechle <ralf@xxxxxxxxxxxxxx> :::::: CC: Ralf Baechle <ralf@xxxxxxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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