Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Thu, 9 May 2019 14:36:29 -0400
From:   Steven Rostedt <rostedt@goodmis.org>
To:     Peter Zijlstra <peterz@infradead.org>
Cc:     Masami Hiramatsu <mhiramat@kernel.org>,
        Josh Poimboeuf <jpoimboe@redhat.com>,
        linux-kernel@vger.kernel.org,
        Linus Torvalds <torvalds@linux-foundation.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>,
        Borislav Petkov <bp@alien8.de>,
        "H. Peter Anvin" <hpa@zytor.com>, x86@kernel.org,
        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>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Nayna Jain <nayna@linux.ibm.com>,
        Masahiro Yamada <yamada.masahiro@socionext.com>,
        Joerg Roedel <jroedel@suse.de>, linux-kselftest@vger.kernel.org
Subject: Re: [PATCH 2/4] x86/kprobes: Fix frame pointer annotations
Message-ID: <20190509143629.5c104011@gandalf.local.home>
In-Reply-To: <20190509182622.GB2623@hirez.programming.kicks-ass.net>
References: <20190508074901.982470324@infradead.org>
        <20190508080612.721269814@infradead.org>
        <20190508115416.nblx7c2kocidpytm@treble>
        <20190508120416.GL2589@hirez.programming.kicks-ass.net>
        <20190508124248.u5ukpbhnh4wpiccq@treble>
        <20190508153907.GM2589@hirez.programming.kicks-ass.net>
        <20190508184848.qerg3flv3ej3xsev@treble>
        <20190509102030.dfa62e058f09d0d8cbdd6053@kernel.org>
        <20190509081431.GO2589@hirez.programming.kicks-ass.net>
        <20190509173741.pfvecznqdndihxzg@home.goodmis.org>
        <20190509182622.GB2623@hirez.programming.kicks-ass.net>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Thu, 9 May 2019 20:26:22 +0200
Peter Zijlstra <peterz@infradead.org> wrote:

> Still, maybe we can wrap the thing in a .macro and reuse things that
> way. Because I really hate there are at least 3 (x2 for x86_64) copies
> of this around.

I'm good with something like this. Have a single place that does the
pt_regs saving would be great. Then I could separate ftrace_regs_caller
from ftrace_caller, and simplify them both, as I would only need to
make sure frame pointers still work for ftrace_caller, and
ftrace_regs_caller would depend on the macro to make sure it works.

-- Steve