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Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h0l31-00069Q-Qc; Mon, 04 Mar 2019 10:42:15 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h0l2y-000693-2N for linux-arm-kernel@lists.infradead.org; Mon, 04 Mar 2019 10:42:13 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 8D26FEBD; Mon, 4 Mar 2019 02:42:11 -0800 (PST) Received: from e107155-lin (e107155-lin.cambridge.arm.com [10.1.196.42]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id BC9DA3F703; Mon, 4 Mar 2019 02:42:08 -0800 (PST) Date: Mon, 4 Mar 2019 10:42:06 +0000 From: Sudeep Holla To: "Haibo Xu (Arm Technology China)" Subject: Re: [PATCH 4/6] powerpc: use common ptrace_syscall_enter hook to handle _TIF_SYSCALL_EMU Message-ID: <20190304104206.GB1504@e107155-lin> References: <247371ae-3360-95e2-bf1d-21eb9332c31c@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <247371ae-3360-95e2-bf1d-21eb9332c31c@arm.com> User-Agent: Mutt/1.9.4 (2018-02-28) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190304_024212_119014_83F06905 X-CRM114-Status: GOOD ( 17.76 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sudeep Holla , Steve Capper , Catalin Marinas , "jdike@addtoit.com" , "x86@kernel.org" , Will Deacon , "linux-kernel@vger.kernel.org" , Oleg Nesterov , Richard Weinberger , Ingo Molnar , Paul Mackerras , Michael Ellerman , Thomas Gleixner , "Bin Lu \(Arm Technology China\)" , "linuxppc-dev@lists.ozlabs.org" , "linux-arm-kernel@lists.infradead.org" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Mar 04, 2019 at 09:36:27AM +0000, Haibo Xu (Arm Technology China) wrote: > On 2019/3/1 2:32, Sudeep Holla wrote: > > Now that we have a new hook ptrace_syscall_enter that can be called from > > syscall entry code and it handles PTRACE_SYSEMU in generic code, we > > can do some cleanup using the same in do_syscall_trace_enter. > > > > Cc: Oleg Nesterov > > Cc: Paul Mackerras > > Cc: Michael Ellerman > > Signed-off-by: Sudeep Holla > > --- > > arch/powerpc/kernel/ptrace.c | 50 ++++++++++++++++-------------------- > > 1 file changed, 22 insertions(+), 28 deletions(-) > > > > diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c > > index cb7e1439cafb..978cd2aac29e 100644 > > --- a/arch/powerpc/kernel/ptrace.c > > +++ b/arch/powerpc/kernel/ptrace.c > > @@ -3264,37 +3264,31 @@ long do_syscall_trace_enter(struct pt_regs *regs) > > { > > u32 flags; > > > > - user_exit(); > > We'd better keep the user_exit() at here in case both context tracking and > SYSCALL_EMU are enabled. > Ah right, spurious change will fix it. -- Regards, Sudeep _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel