linux-kernel - Re: [PATCH v2 14/18] sparc: io: implement dummy relaxed accessor macros for writes

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Date:	Thu, 22 May 2014 20:18:38 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	Will Deacon <will.deacon@....com>
Cc:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	arnd@...db.de, monstr@...str.eu, dhowells@...hat.com,
	broonie@...aro.org, benh@...nel.crashing.org, peterz@...radead.org,
	paulmck@...ux.vnet.ibm.com, "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH v2 14/18] sparc: io: implement dummy relaxed accessor
 macros for writes

On Thu, May 22, 2014 at 05:47:26PM +0100, Will Deacon wrote:
> write{b,w,l,q}_relaxed are implemented by some architectures in order to
> permit memory-mapped I/O accesses with weaker barrier semantics than the
> non-relaxed variants.
> 
> This patch adds dummy macros for the write accessors to sparc, in the
> same vein as the dummy definitions for the relaxed read accessors. The
> existing relaxed read{b,w,l} accessors are moved into asm/io.h, since
> they are identical between 32-bit and 64-bit machines.
> 
> Cc: "David S. Miller" <davem@...emloft.net>
> Signed-off-by: Will Deacon <will.deacon@....com>
Look good:
Acked-by: Sam Ravnborg <sam@...nborg.org>

But you should wait for David's ack too.

	Sam


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