linux-kernel - kernel/time/posix-stubs.o: warning: objtool: sys_ni_posix_timers.cold.1()+0x0: unreachable instruction

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Date:   Tue, 29 May 2018 10:41:21 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        Ingo Molnar <mingo@...nel.org>
Subject: kernel/time/posix-stubs.o: warning: objtool:
 sys_ni_posix_timers.cold.1()+0x0: unreachable instruction

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   786b71f5b754273ccef6d9462e52062b3e1f9877
commit: 13810435b9a7014fb92eb715f77da488f3b65b99 objtool: Support GCC 8's cold subfunctions
date:   2 weeks ago
config: x86_64-randconfig-i0-201821 (attached as .config)
compiler: gcc-8 (Debian 8.1.0-3) 8.1.0
reproduce:
        git checkout 13810435b9a7014fb92eb715f77da488f3b65b99
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

>> kernel/time/posix-stubs.o: warning: objtool: sys_ni_posix_timers.cold.1()+0x0: unreachable instruction

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0-DAY kernel test infrastructure                Open Source Technology Center
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