linux-kernel - Re: [tip: objtool/core] objtool: Function to get the name of a CPU feature

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Message-ID: <a8b6e603-e3c0-4bc3-b36b-29771d30183b@oracle.com>
Date: Mon, 24 Nov 2025 13:40:47 +0100
From: Alexandre Chartre <alexandre.chartre@...cle.com>
To: Borislav Petkov <bp@...en8.de>, Peter Zijlstra <peterz@...radead.org>
Cc: alexandre.chartre@...cle.com, linux-kernel@...r.kernel.org,
        linux-tip-commits@...r.kernel.org,
        Josh Poimboeuf <jpoimboe@...nel.org>, x86@...nel.org
Subject: Re: [tip: objtool/core] objtool: Function to get the name of a CPU
 feature



On 11/24/25 13:26, Borislav Petkov wrote:
> On Mon, Nov 24, 2025 at 12:59:42PM +0100, Peter Zijlstra wrote:
>> On Mon, Nov 24, 2025 at 10:44:01AM -0000, tip-bot2 for Alexandre Chartre wrote:
>>> The following commit has been merged into the objtool/core branch of tip:
>>>
>>> Commit-ID:     afff4e5820e9a0d609740a83c366f3f0335db342
>>> Gitweb:        https://git.kernel.org/tip/afff4e5820e9a0d609740a83c366f3f0335db342
>>> Author:        Alexandre Chartre <alexandre.chartre@...cle.com>
>>> AuthorDate:    Fri, 21 Nov 2025 10:53:36 +01:00
>>> Committer:     Peter Zijlstra <peterz@...radead.org>
>>> CommitterDate: Mon, 24 Nov 2025 11:35:06 +01:00
>>>
>>> objtool: Function to get the name of a CPU feature
> 
> Also, this commit name needs a verb.
> 
>> Boris just reported that this doesn't work on mawk, since it uses a GNU
>> awk extension (3rd argument for match()).
>>
>> Could you please look at writing this in strict POSIX awk?
> 
> The fail is:
> 
> awk: ../arch/x86/tools/gen-cpu-feature-names-x86.awk: line 20: syntax error at or near ,
> awk: ../arch/x86/tools/gen-cpu-feature-names-x86.awk: line 23: syntax error at or near }
> awk: ../arch/x86/tools/gen-cpu-feature-names-x86.awk: line 26: syntax error at or near ,
> awk: ../arch/x86/tools/gen-cpu-feature-names-x86.awk: line 29: syntax error at or near }
> make[5]: *** [arch/x86/Build:21: /root/kernel/linux/tools/objtool/arch/x86/lib/cpu-feature-names.c] Error 2
> make[5]: *** Deleting file '/root/kernel/linux/tools/objtool/arch/x86/lib/cpu-feature-names.c'
> make[4]: *** [/root/kernel/linux/tools/build/Makefile.build:142: arch/x86] Error 2
> make[4]: *** Waiting for unfinished jobs....
> make[3]: *** [Makefile:104: /root/kernel/linux/tools/objtool/objtool-in.o] Error 2
> make[2]: *** [Makefile:73: objtool] Error 2
> make[1]: *** [/root/kernel/linux/Makefile:1449: tools/objtool] Error 2
> make: *** [Makefile:248: __sub-make] Error 2
> 
> ls -al /usr/bin/awk
> lrwxrwxrwx 1 root root 21 Feb 19  2021 /usr/bin/awk -> /etc/alternatives/awk
> ls -al /etc/alternatives/awk
> lrwxrwxrwx 1 root root 13 Feb 19  2021 /etc/alternatives/awk -> /usr/bin/mawk
> 
> That's debian.
> 

Ok. I am working on it.

alex.