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

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Date:	Wed, 27 Apr 2016 22:59:37 +0800
From:	Boqun Feng <boqun.feng@...il.com>
To:	Pan Xinhui <xinhui@...ux.vnet.ibm.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 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>

Regards,
Boqun

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