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

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Date:	Fri, 31 May 2013 19:30:38 +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 see,
I will make one more test .

Thanks for your clarification .

-----Original Message-----
From: Will Deacon [mailto:will.deacon@....com] 
Sent: Friday, May 31, 2013 7:13 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 12:02:49PM +0100, Wang, Yalin wrote:
> Hi  Will,
> 
> I have merge your code ,
> But there is a different ,
> 
> +	
> +	ct_user_exit

I thought you didn't have ct_user_exit? In which case, just delete this line.

> +#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

Hard to tell without context. You can take a look at my git tree if you like (I fixed it up based on Nico's comment):

  https://git.kernel.org/cgit/linux/kernel/git/will/linux.git/commit/?h=misc-patches

Will
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