Subject: Re: [PATCH bpf-next 1/2] bpf: change var type of BTF_ID_LIST to static

From: kernel test robot <[email-masked]>
Date: Sat, 18 Jul 2020 08:10:09 +0800

Hi Yonghong,

I love your patch! Yet something to improve:

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

url:    https://github.com/0day-ci/linux/commits/Yonghong-Song/compute-bpf_skc_to_-helper-socket-btf-ids-at-build-time/20200718-025117
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
config: x86_64-rhel-7.6-kselftests (attached as .config)
compiler: gcc-9 (Debian 9.3.0-14) 9.3.0
reproduce (this is a W=1 build):
        # save the attached .config to linux build tree
        make W=1 ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email-masked]>

All errors (new ones prefixed by >>):

   In file included from kernel/bpf/btf.c:21:
   kernel/bpf/btf.c:3625:13: warning: array 'bpf_ctx_convert_btf_id' assumed to have one element
    3625 | BTF_ID_LIST(bpf_ctx_convert_btf_id)
         |             ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/btf_ids.h:69:12: note: in definition of macro 'BTF_ID_LIST'
      69 | static u32 name[];
         |            ^~~~
   /tmp/ccXM0qVD.s: Assembler messages:
>> /tmp/ccXM0qVD.s:23808: Error: symbol `bpf_ctx_convert_btf_id' is already defined

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0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/[email-masked]