linux-kernel - Re: [PATCH V4] powerpc: Implement {cmp}xchg for u8 and u16

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Message-ID: <5721E427.3000109@linux.vnet.ibm.com>
Date:	Thu, 28 Apr 2016 18:21:27 +0800
From:	Pan Xinhui <xinhui@...ux.vnet.ibm.com>
To:	Boqun Feng <boqun.feng@...il.com>
CC:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	benh@...nel.crashing.org, paulus@...ba.org, mpe@...erman.id.au,
	peterz@...radead.org, paulmck@...ux.vnet.ibm.com,
	tglx@...utronix.de
Subject: Re: [PATCH V4] powerpc: Implement {cmp}xchg for u8 and u16



On 2016年04月27日 22:59, Boqun Feng wrote:
> On Wed, Apr 27, 2016 at 10:50:34PM +0800, Boqun Feng wrote:
>>
>> Sorry, my bad, we can't implement cmpxchg like this.. please ignore
>> this, I should really go to bed soon...
>>
>> But still, we can save the "tmp" for xchg() I think.
>>
> 
> No.. we can't. Sorry for all the noise.
> 
> This patch looks good to me.
> 
> FWIW, you can add
> 
> Acked-by: Boqun Feng <boqun.feng@...il.com>
> 
thanks!

> Regards,
> Boqun
>