From: kernel test robot <lkp@intel.com>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: oe-kbuild-all@lists.linux.dev,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Borislav Petkov <bp@suse.de>, Sasha Levin <sashal@kernel.org>
Subject: [stable:linux-5.4.y 4730/8053] arch/x86/kernel/cpu/mce/core.o: warning: objtool: ex_handler_rdmsr_fault()+0xf: unreachable instruction
Date: Fri, 14 Apr 2023 00:09:50 +0800 [thread overview]
Message-ID: <202304140009.FCTdOYcH-lkp@intel.com> (raw)
Hi Thomas,
FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-5.4.y
head: 32bea3bac5ca484c6f7e302c8c96fc686f62e7b4
commit: 0a0fbbd6cb654f748d87c0db10c31741101f2ab2 [4730/8053] x86/mce: Deduplicate exception handling
config: x86_64-rhel-8.3-ltp (https://download.01.org/0day-ci/archive/20230414/202304140009.FCTdOYcH-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
# https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?id=0a0fbbd6cb654f748d87c0db10c31741101f2ab2
git remote add stable https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
git fetch --no-tags stable linux-5.4.y
git checkout 0a0fbbd6cb654f748d87c0db10c31741101f2ab2
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=x86_64 olddefconfig
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash M=arch/x86
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304140009.FCTdOYcH-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> arch/x86/kernel/cpu/mce/core.o: warning: objtool: ex_handler_rdmsr_fault()+0xf: unreachable instruction
objdump-func vmlinux.o ex_handler_rdmsr_fault:
0000 000000000008c7e0 <ex_handler_rdmsr_fault>:
0000 8c7e0: e8 00 00 00 00 call 8c7e5 <ex_handler_rdmsr_fault+0x5> 8c7e1: R_X86_64_PLT32 __fentry__-0x4
0005 8c7e5: 48 89 f7 mov %rsi,%rdi
0008 8c7e8: 31 f6 xor %esi,%esi
000a 8c7ea: e8 31 a8 ff ff call 87020 <ex_handler_msr_mce>
000f 8c7ef: b8 01 00 00 00 mov $0x1,%eax
0014 8c7f4: c3 ret
0015 8c7f5: 66 66 2e 0f 1f 84 00 00 00 00 00 data16 cs nopw 0x0(%rax,%rax,1)
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
reply other threads:[~2023-04-13 16:11 UTC|newest]
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