From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <stable-owner@vger.kernel.org>
Received: from mail.kernel.org ([198.145.29.99]:49454 "EHLO mail.kernel.org"
        rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
        id S1726344AbeK3JUK (ORCPT <rfc822;stable@vger.kernel.org>);
        Fri, 30 Nov 2018 04:20:10 -0500
Date: Fri, 30 Nov 2018 07:13:09 +0900
From: Masami Hiramatsu <mhiramat@kernel.org>
To: Catalin Marinas <catalin.marinas@arm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>,
        Naresh Kamboju <naresh.kamboju@linaro.org>,
        Will Deacon <will.deacon@arm.com>,
        Mark Rutland <mark.rutland@arm.com>,
        Ingo Molnar <mingo@redhat.com>,
        Masami Hiramatsu <masami.hiramatsu@linaro.org>,
        linux-kernel@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH v2] arm64: ftrace: Fix to enable syscall events on arm64
Message-Id: <20181130071309.dfa552d2bcd7283788e5563e@kernel.org>
In-Reply-To: <20181129165329.GC22027@arrakis.emea.arm.com>
References: <20181128195921.GA32668@arm.com>
        <154346997347.21404.9819884326251206341.stgit@devbox>
        <20181129165329.GC22027@arrakis.emea.arm.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: stable-owner@vger.kernel.org
List-ID: <stable.vger.kernel.org>

On Thu, 29 Nov 2018 16:53:30 +0000
Catalin Marinas <catalin.marinas@arm.com> wrote:

> On Thu, Nov 29, 2018 at 02:39:33PM +0900, Masami Hiramatsu wrote:
> > Since commit 4378a7d4be30 ("arm64: implement syscall wrappers")
> > introduced "__arm64_" prefix to all syscall wrapper symbols in
> > sys_call_table, syscall tracer can not find corresponding
> > metadata from syscall name. In the result, we have no syscall
> > ftrace events on arm64 kernel, and some bpf testcases are failed
> > on arm64.
> > 
> > To fix this issue, this introduces custom
> > arch_syscall_match_sym_name() which skips first 8 bytes when
> > comparing the syscall and symbol names.
> > 
> > Fixes: 4378a7d4be30 ("arm64: implement syscall wrappers")
> > Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
> > Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
> > Acked-by: Will Deacon <will.deacon@arm.com>
> > Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org>
> > Cc: stable@vger.kernel.org
> 
> Queued for 4.20. Thanks.

Thank you Catalin!

> 
> -- 
> Catalin


-- 
Masami Hiramatsu <mhiramat@kernel.org>