linux-kernel - Re: [PATCH v3 6/8] tools bpf_jit_disasm: Don't display disassembler-four-args feature test

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Date:   Mon, 1 Aug 2022 11:41:10 -0700
From:   Andres Freund <andres@...razel.de>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     bpf@...r.kernel.org, linux-kernel@...r.kernel.org,
        Alexei Starovoitov <ast@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Sedat Dilek <sedat.dilek@...il.com>,
        Quentin Monnet <quentin@...valent.com>,
        Ben Hutchings <benh@...ian.org>,
        Daniel Borkmann <daniel@...earbox.net>
Subject: Re: [PATCH v3 6/8] tools bpf_jit_disasm: Don't display
 disassembler-four-args feature test

Hi,

On 2022-08-01 15:27:22 -0300, Arnaldo Carvalho de Melo wrote:
> ⬢[acme@...lbox perf]$ git log --oneline -7
> cebe4f3a4a0af5bf (HEAD) tools bpf_jit_disasm: Don't display disassembler-four-args feature test
> 7f62593e5582cb27 tools bpf_jit_disasm: Fix compilation error with new binutils
> ee4dc290ee5c09b7 tools perf: Fix compilation error with new binutils
> 335f8d183a609793 tools include: add dis-asm-compat.h to handle version differences
> f2f95e8d0def9c5f tools build: Don't display disassembler-four-args feature test
> ede0fece841bb743 tools build: Add feature test for init_disassemble_info API changes
> 00b32625982e0c79 perf test: Add ARM SPE system wide test
> ⬢[acme@...lbox perf]$
> 
> ⬢[acme@...lbox perf]$ make -C tools/bpf/bpftool/ clean
> make: Entering directory '/var/home/acme/git/perf/tools/bpf/bpftool'
>   CLEAN   libbpf
>   CLEAN   libbpf-bootstrap
>   CLEAN   feature-detect
>   CLEAN   bpftool
>   CLEAN   core-gen
> make: Leaving directory '/var/home/acme/git/perf/tools/bpf/bpftool'
> ⬢[acme@...lbox perf]$ make -C tools/bpf/bpftool/
> make: Entering directory '/var/home/acme/git/perf/tools/bpf/bpftool'
> 
> Auto-detecting system features:
> ...                        libbfd: [ on  ]
> ...        disassembler-four-args: [ on  ]
> ...                          zlib: [ on  ]
> ...                        libcap: [ on  ]
> ...               clang-bpf-co-re: [ on  ]
> <SNIP>
> 
> It is still there, we need the hunk below, that I folded into your patch, to
> disable it, please ack :-)

This commit just removed disassembler-four-args display for bpf_jit_disasm,
not bpftool. That should be in a later commit.

Greetings,

Andres Freund