Re: [PATCH bpf-next] bpf: Add bpf_[skb|xdp]_packet_hash.

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

Hi Harsh,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on bpf-next/master]

url:    https://github.com/intel-lab-lkp/linux/commits/Harsh-Modi/bpf-Add-bpf_-skb-xdp-_packet_hash/20220901-073646
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
config: um-x86_64_defconfig (https://download.01.org/0day-ci/archive/20220903/202209030436.cVQGH3xQ-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-5) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/078b031d06a73f3fc17333d808db554ec4753a90
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Harsh-Modi/bpf-Add-bpf_-skb-xdp-_packet_hash/20220901-073646
        git checkout 078b031d06a73f3fc17333d808db554ec4753a90
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=um SUBARCH=x86_64 SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   /usr/bin/ld: warning: arch/x86/um/vdso/vdso.o: missing .note.GNU-stack section implies executable stack
   /usr/bin/ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker
   /usr/bin/ld: warning: .tmp_vmlinux.kallsyms1 has a LOAD segment with RWX permissions
   /usr/bin/ld: net/core/filter.o: in function `crc32c_csum_update':
>> filter.c:(.text+0x61fd): undefined reference to `crc32c'
   collect2: error: ld returned 1 exit status

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