Re: [PATCH] mm: use this_cpu_cmpxchg_double in put_cpu_partial

[kbuild test robot]

Hi Wengang,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v4.20-rc3 next-20181121]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Wengang-Wang/mm-use-this_cpu_cmpxchg_double-in-put_cpu_partial/20181119-215159
config: x86_64-randconfig-e2-11191630 (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

>> mm/slub.o: warning: objtool: ___slab_alloc.constprop.72()+0x5be: unreachable instruction

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

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