Re: [RFC] Exempt multicast address from five-second neighbor lifetime

[kernel test robot <lkp@intel.com>]

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Hi Jeff,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on ipvs/master]
[also build test WARNING on linus/master v5.9 next-20201016]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Jeff-Dike/Exempt-multicast-address-from-five-second-neighbor-lifetime/20201016-234627
base:   https://git.kernel.org/pub/scm/linux/kernel/git/horms/ipvs.git master
config: nios2-randconfig-s031-20201016 (attached as .config)
compiler: nios2-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-rc1-2-g368fd9ce-dirty
        # https://github.com/0day-ci/linux/commit/3afd4b26a439959c7e9250ea6ede30645bb4f2ff
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jeff-Dike/Exempt-multicast-address-from-five-second-neighbor-lifetime/20201016-234627
        git checkout 3afd4b26a439959c7e9250ea6ede30645bb4f2ff
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=nios2 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


"sparse warnings: (new ones prefixed by >>)"
>> net/ipv4/arp.c:936:16: sparse: sparse: cast from restricted __be32

vim +936 net/ipv4/arp.c

   933	
   934	static int arp_is_multicast(const void *pkey)
   935	{
 > 936		return IN_MULTICAST(htonl(*((u32 *) pkey)));
   937	}
   938	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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