kernel-hardening - Re: [PATCH v2 2/2] kernel/trace: Remove function callback casts

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Message-ID: <20200724175500.GD3123@ubuntu>
Date: Fri, 24 Jul 2020 19:55:00 +0200
From: Oscar Carter <oscar.carter@....com>
To: Steven Rostedt <rostedt@...dmis.org>
Cc: Oscar Carter <oscar.carter@....com>, Ingo Molnar <mingo@...hat.com>,
	Kees Cook <keescook@...omium.org>, linux-kernel@...r.kernel.org,
	kernel-hardening@...ts.openwall.com, Jann Horn <jannh@...gle.com>
Subject: Re: [PATCH v2 2/2] kernel/trace: Remove function callback casts

On Fri, Jul 24, 2020 at 01:40:20PM -0400, Steven Rostedt wrote:
> On Fri, 24 Jul 2020 13:36:56 -0400
> Steven Rostedt <rostedt@...dmis.org> wrote:
>
> > Which BTW, is supported by the following architectures:
> >
> >   arm
> >   arm64
> >   csky
> >   parisc
> >   powerpc
> >   riscv
> >   s390
> >   x86
>
> And here's a list of architectures that have function tracing but need
> to be updated:
>
>   ia64
>   microblaze
>   mips
>   nds32
>   sh
>   sparc
>   xtensa
>
> >
> > All of the above architectures should not even be hitting the code
> > that does the function cast. What architecture are you doing all this
> > for?
>
> Which one of the above is this patch set for?

This patch is the result of a warning obtained with the following:

make allmodconfig ARCH=powerpc
make ARCH=powerpc CROSS_COMPILE=powerpc-linux-gnu- -j4

And with the -Wcast-function-type enabled in the top level makefile.

>
> -- Steve

Thanks,
Oscar Carter

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