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Date:   Tue, 7 May 2019 11:45:37 -0400
From:   Steven Rostedt <rostedt@goodmis.org>
To:     Linus Torvalds <torvalds@linux-foundation.org>
Cc:     Peter Zijlstra <peterz@infradead.org>,
        Andy Lutomirski <luto@amacapital.net>,
        Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
        Ingo Molnar <mingo@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Andy Lutomirski <luto@kernel.org>,
        Nicolai Stange <nstange@suse.de>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "H. Peter Anvin" <hpa@zytor.com>,
        "the arch/x86 maintainers" <x86@kernel.org>,
        Josh Poimboeuf <jpoimboe@redhat.com>,
        Jiri Kosina <jikos@kernel.org>,
        Miroslav Benes <mbenes@suse.cz>,
        Petr Mladek <pmladek@suse.com>,
        Joe Lawrence <joe.lawrence@redhat.com>,
        Shuah Khan <shuah@kernel.org>,
        Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
        Tim Chen <tim.c.chen@linux.intel.com>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        Mimi Zohar <zohar@linux.ibm.com>,
        Juergen Gross <jgross@suse.com>,
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        <linux-kselftest@vger.kernel.org>, stable <stable@vger.kernel.org>,
        Masami Hiramatsu <mhiramat@kernel.org>
Subject: Re: [RFC][PATCH 1/2] x86: Allow breakpoints to emulate call
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On Tue, 7 May 2019 08:31:14 -0700
Linus Torvalds <torvalds@linux-foundation.org> wrote:

> The reality is that changing something fundamental like the kernel
> stack at this point for an architecture that will not change in the
> future is silly.

x86_32 will no longer have updates, but will x86_64? And we will
constantly be adding more work around hacks to handle the difference of
the pt_regs in the future. I see Peter's patch easing that future pain.

> 
> The reality is that Peter's patch is much bigger than mine, because it
> needed a lot of other changes *because* it did that change.

It was much bigger because it removed a lot of the work around hacks.

But you are the "benevolent dictator", and I don't see me changing your
mind.

I'll go and implement it the way you like.

-- Steve