linux-kernel - [PATCH v2 11/18] mn10300: io: implement dummy relaxed accessor macros for writes

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Message-Id: <1400777250-17335-12-git-send-email-will.deacon@arm.com>
Date:	Thu, 22 May 2014 17:47:23 +0100
From:	Will Deacon <will.deacon@....com>
To:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	arnd@...db.de, monstr@...str.eu, dhowells@...hat.com,
	broonie@...aro.org, benh@...nel.crashing.org, peterz@...radead.org,
	paulmck@...ux.vnet.ibm.com, Will Deacon <will.deacon@....com>
Subject: [PATCH v2 11/18] mn10300: io: implement dummy relaxed accessor macros for writes

write{b,w,l}_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 mn10300, in the
same vein as the dummy definitions for the relaxed read accessors.

Cc: David Howells <dhowells@...hat.com>
Signed-off-by: Will Deacon <will.deacon@....com>
---
 arch/mn10300/include/asm/io.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/mn10300/include/asm/io.h b/arch/mn10300/include/asm/io.h
index e6ed0d897ccc..897ba3c12b32 100644
--- a/arch/mn10300/include/asm/io.h
+++ b/arch/mn10300/include/asm/io.h
@@ -67,6 +67,10 @@ static inline void writel(u32 b, volatile void __iomem *addr)
 #define __raw_writew writew
 #define __raw_writel writel
 
+#define writeb_relaxed writeb
+#define writew_relaxed writew
+#define writel_relaxed writel
+
 /*****************************************************************************/
 /*
  * traditional input/output functions
-- 
1.9.2

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