linux-kernel - Re: [linux-next:master 4617/7272] kernel/bpf/disasm.c:90:12: sparse: sparse: symbol 'bpf_alu_sign_string' was not declared. Should it be static?

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Date:   Fri, 4 Aug 2023 16:24:41 -0700
From:   Martin KaFai Lau <martin.lau@...ux.dev>
To:     Yonghong Song <yonghong.song@...ux.dev>
Cc:     kernel test robot <lkp@...el.com>, oe-kbuild-all@...ts.linux.dev,
        Linux Memory Management List <linux-mm@...ck.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Quentin Monnet <quentin@...valent.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Song Liu <song@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        bpf@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [linux-next:master 4617/7272] kernel/bpf/disasm.c:90:12: sparse:
 sparse: symbol 'bpf_alu_sign_string' was not declared. Should it be static?

On 8/4/23 3:40 PM, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head:   bdffb18b5dd8071cd25685b966f380a30b1fadaa
> commit: f835bb6222998c8655bc4e85287d42b57c17b208 [4617/7272] bpf: Add kernel/bpftool asm support for new instructions
> config: i386-randconfig-i063-20230730 (https://download.01.org/0day-ci/archive/20230805/202308050615.wxAn1v2J-lkp@intel.com/config)
> compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
> reproduce: (https://download.01.org/0day-ci/archive/20230805/202308050615.wxAn1v2J-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202308050615.wxAn1v2J-lkp@intel.com/

fwiw, the fix is in 
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/commit/?id=1e8e2efb34023c5113ec679eae3c59ae2cd57b13 
.
I have added the above tags to the fix.

> 
> sparse warnings: (new ones prefixed by >>)
>>> kernel/bpf/disasm.c:90:12: sparse: sparse: symbol 'bpf_alu_sign_string' was not declared. Should it be static?
>>> kernel/bpf/disasm.c:95:12: sparse: sparse: symbol 'bpf_movsx_string' was not declared. Should it be static?
>