linux-kernel - RE: A bug about system call on ARM

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Message-ID: <35FD53F367049845BC99AC72306C23D1610991B874@CNBJMBX05.corpusers.net>
Date:	Fri, 31 May 2013 19:02:49 +0800
From:	"Wang, Yalin" <Yalin.Wang@...ymobile.com>
To:	'Will Deacon' <will.deacon@....com>
CC:	'richard -rw- weinberger' <richard.weinberger@...il.com>,
	"'linux-arch@...r.kernel.org'" <linux-arch@...r.kernel.org>,
	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>,
	"'linux-arm-kernel@...ts.infradead.org'" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: RE: A bug about system call on ARM

Hi  Will,

I have merge your code ,
But there is a different ,

+	
+	ct_user_exit
+
+#ifdef CONFIG_ALIGNMENT_TRAP
+	ldr	ip, __cr_alignment
+	ldr	ip, [ip]
+	mcr	p15, 0, ip, c1, c0		@ update control register
+#endif 

+	enable_irq
+	get_thread_info tsk

Is this change ok ?


Thanks 

-----Original Message-----
From: linux-arch-owner@...r.kernel.org [mailto:linux-arch-owner@...r.kernel.org] On Behalf Of Will Deacon
Sent: Friday, May 31, 2013 4:47 PM
To: Wang, Yalin
Cc: 'richard -rw- weinberger'; 'linux-arch@...r.kernel.org'; 'linux-kernel@...r.kernel.org'; 'linux-arm-kernel@...ts.infradead.org'
Subject: Re: A bug about system call on ARM

On Fri, May 31, 2013 at 03:56:31AM +0100, Wang, Yalin wrote:
> Hi Will,
> 
> Thanks for your patch ,
> 
> But I found  I don't have ct_user_exit  macro In my 
> arch/arm/kernel/entry-common.S
> 
> My kernel version is 3.4.0

Well things have moved on this since then (we're approaching 3.10, so you might consider an upgrade!).

For the purposes of this patch, you can just delete the ct_user_exit line.

Will
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