linux-kernel - [peterz-queue:objtool/urgent 9/9] arch/x86/include/asm/extable.h:47:86: warning: 'noreturn' function does return

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Message-ID: <202205262227.2m2DJfpJ-lkp@intel.com>
Date:   Thu, 26 May 2022 22:11:34 +0800
From:   kernel test robot <lkp@...el.com>
To:     Borislav Petkov <bp@...e.de>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>
Subject: [peterz-queue:objtool/urgent 9/9]
 arch/x86/include/asm/extable.h:47:86: warning: 'noreturn' function does
 return

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git objtool/urgent
head:   43c6fc6a431b43163dc3950543dd87b986f25945
commit: 43c6fc6a431b43163dc3950543dd87b986f25945 [9/9] x86/extable: Annotate ex_handler_msr_mce() as a dead end
config: x86_64-randconfig-a013 (https://download.01.org/0day-ci/archive/20220526/202205262227.2m2DJfpJ-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-1) 11.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?id=43c6fc6a431b43163dc3950543dd87b986f25945
        git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
        git fetch --no-tags peterz-queue objtool/urgent
        git checkout 43c6fc6a431b43163dc3950543dd87b986f25945
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/mm/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

   In file included from arch/x86/include/asm/uaccess.h:13,
                    from include/linux/uaccess.h:11,
                    from arch/x86/mm/extable.c:3:
   arch/x86/include/asm/extable.h: In function 'ex_handler_msr_mce':
>> arch/x86/include/asm/extable.h:47:86: warning: 'noreturn' function does return
      47 | static inline void __noreturn ex_handler_msr_mce(struct pt_regs *regs, bool wrmsr) { }
         |                                                                                      ^


vim +/noreturn +47 arch/x86/include/asm/extable.h

    43	
    44	#ifdef CONFIG_X86_MCE
    45	extern void __noreturn ex_handler_msr_mce(struct pt_regs *regs, bool wrmsr);
    46	#else
  > 47	static inline void __noreturn ex_handler_msr_mce(struct pt_regs *regs, bool wrmsr) { }
    48	#endif
    49	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp