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Date:   Thu, 29 Nov 2018 16:53:30 +0000
From:   Catalin Marinas <catalin.marinas@arm.com>
To:     Masami Hiramatsu <mhiramat@kernel.org>
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: <20181129165329.GC22027@arrakis.emea.arm.com>
References: <20181128195921.GA32668@arm.com>
 <154346997347.21404.9819884326251206341.stgit@devbox>
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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.

-- 
Catalin