linux-kernel - [PATCH v2 07/18] cris: io: implement dummy relaxed accessor macros for writes

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Message-Id: <1400777250-17335-8-git-send-email-will.deacon@arm.com>
Date:	Thu, 22 May 2014 17:47:19 +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>,
	Mikael Starvik <starvik@...s.com>
Subject: [PATCH v2 07/18] cris: 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 Cris, in the same
vein as the dummy definitions for the relaxed read accessors.

Cc: Mikael Starvik <starvik@...s.com>
Acked-by: Jesper Nilsson <jesper.nilsson@...s.com>
Signed-off-by: Will Deacon <will.deacon@....com>
---
 arch/cris/include/asm/io.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/cris/include/asm/io.h b/arch/cris/include/asm/io.h
index e59dba12ce94..752a3f45df60 100644
--- a/arch/cris/include/asm/io.h
+++ b/arch/cris/include/asm/io.h
@@ -112,6 +112,9 @@ static inline void writel(unsigned int b, volatile void __iomem *addr)
 	else
 		*(volatile unsigned int __force *) addr = b;
 }
+#define writeb_relaxed(b, addr) writeb(b, addr)
+#define writew_relaxed(b, addr) writew(b, addr)
+#define writel_relaxed(b, addr) writel(b, addr)
 #define __raw_writeb writeb
 #define __raw_writew writew
 #define __raw_writel writel
-- 
1.9.2

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