linux-kernel - Re: [PATCH] scripts: dummy-tools, add pahole

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Message-ID: <ace87421-eefb-f4f6-307f-cd2990fb25eb@suse.cz>
Date:   Thu, 14 Apr 2022 11:42:07 +0200
From:   Jiri Slaby <jslaby@...e.cz>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Subject: Re: [PATCH] scripts: dummy-tools, add pahole

On 14. 04. 22, 11:33, Masahiro Yamada wrote:
> On Thu, Apr 14, 2022 at 6:14 PM Jiri Slaby <jslaby@...e.cz> wrote:
>>
>> CONFIG_PAHOLE_VERSION is a part of a config since the commit below. And
>> when multiple people update the config, this value constantly changes.
>> Even if they use dummy scripts.
>>
>> To fix this:
>> * add a pahole dummy script returning v99.99 -> 9999
>> * call it in Makefile taking CROSS_COMPILE into account.
>>
>> The latter happens only if $(CROSS_COMPILE)pahole really exists. This is
>> because a cross pahole likely exists only in dummy tools now, not in
>> real cross tools.
> 
> 
> I do not think this is the right thing to do.
> 
> (As I said somewhere, I am opposed to checking pahole version in Kconfig).

If you ask me, I am all for removal as this causes pain. But it's there, 
so I cannot do anything about that.

> Also, $(CROSS_COMPILE)pahole looks insane.
> 
> You can create a dummy pahole in your local system.
> 
> $ echo 'echo v99.99' > $HOME/bin/dummy-pahole
> $ chmod +x  $HOME/bin/dummy-pahole
> $ make CROSS_COMPILE=scripts/dummy-tools  PAHOLE=dummy-pahole  menuconfig

Well, the question is how do I that for every kernel developer in SUSE?

thanks,
-- 
js
suse labs