linux-kernel - Re: [GIT PULL] tracing: Fixes and clean ups for v5.14

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Message-ID: <CAHk-=wj=8xh+AcwQ+w62-QHfVU6wXC2xW8L17VvVBaR6dR6Ttg@mail.gmail.com>
Date:   Thu, 12 Aug 2021 07:54:48 -1000
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Daniel Bristot de Oliveira <bristot@...nel.org>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Randy Dunlap <rdunlap@...radead.org>
Subject: Re: [GIT PULL] tracing: Fixes and clean ups for v5.14

On Thu, Aug 12, 2021 at 7:33 AM Steven Rostedt <rostedt@...dmis.org> wrote:
>
> That was my take too, when this was first addressed:
>
>   https://lore.kernel.org/lkml/20210730204050.46975ae2@oasis.local.home/
>
> >
> > The commit message talks about "some compilers/analyzers" without any
> > explanation, and the "Link:" thing doesn't link to anything useful
> > either.
>
> I should have added the above link. :-/

Even the above link doesn't explain it to me.

What is it that gives this crazy garbage warning?

It looks like Randy Dunlap compiles with the '-Wmain' flag, and then
complains about it hurting.

It's a classic case of "Doctor, doctor, it hurts when I hit myself in
the head with an ice pick".

The solution is not to take some Ibuprofen.

The solution is DON'T DO THAT THEN.

People who build with W=2 or some other crazy thing need to understand
that the bad warnings it exposes are not kernel problems, they are
THEIR problems.

               Linus