linux-kernel - arch/x86/events/intel/uncore_snbep.o: warning: objtool: snbep_uncore_msr_enable_event()+0x2e: function has unreachable instruction

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Message-ID: <201607200941.I2Mgxr9T%fengguang.wu@intel.com>
Date:	Wed, 20 Jul 2016 09:25:42 +0800
From:	kbuild test robot <fengguang.wu@...el.com>
To:	unlisted-recipients:; (no To-header on input)
Cc:	kbuild-all@...org, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...nel.org>,
	Kan Liang <kan.liang@...el.com>,
	"Peter Zijlstra (Intel)" <peterz@...radead.org>
Subject: arch/x86/events/intel/uncore_snbep.o: warning: objtool:
 snbep_uncore_msr_enable_event()+0x2e: function has unreachable instruction

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   47ef4ad2684d380dd6d596140fb79395115c3950
commit: 3b94a891667c30fb4624221497d77fc65d950345 perf/x86/intel/uncore: Remove SBOX support for Broadwell server
date:   7 weeks ago
config: x86_64-randconfig-s0-07191857 (attached as .config)
compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
reproduce:
        git checkout 3b94a891667c30fb4624221497d77fc65d950345
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

>> arch/x86/events/intel/uncore_snbep.o: warning: objtool: snbep_uncore_msr_enable_event()+0x2e: function has unreachable instruction

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0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

Download attachment ".config.gz" of type "application/octet-stream" (23892 bytes)