linux-kernel - [PATCH v3 05/17] frv: io: implement dummy relaxed accessor macros for writes

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Message-Id: <1411579056-16966-6-git-send-email-will.deacon@arm.com>
Date:	Wed, 24 Sep 2014 18:17:24 +0100
From:	Will Deacon <will.deacon@....com>
To:	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	arnd@...db.de, benh@...nel.crashing.org, chris@...kel.net,
	cmetcalf@...era.com, davem@...emloft.net, deller@....de,
	dhowells@...hat.com, geert@...ux-m68k.org,
	heiko.carstens@...ibm.com, hpa@...or.com, jcmvbkbc@...il.com,
	jesper.nilsson@...s.com, mingo@...hat.com, monstr@...str.eu,
	paulmck@...ux.vnet.ibm.com, rdunlap@...radead.org,
	sam@...nborg.org, schwidefsky@...ibm.com, starvik@...s.com,
	takata@...ux-m32r.org, tglx@...utronix.de, tony.luck@...el.com,
	daniel.thompson@...aro.org, broonie@...aro.org,
	linux@....linux.org.uk, Will Deacon <will.deacon@....com>
Subject: [PATCH v3 05/17] frv: 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 frv, 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/frv/include/asm/io.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/frv/include/asm/io.h b/arch/frv/include/asm/io.h
index 8cb50a2fbcb2..99bb7efaf9b7 100644
--- a/arch/frv/include/asm/io.h
+++ b/arch/frv/include/asm/io.h
@@ -243,6 +243,9 @@ static inline void writel(uint32_t datum, volatile void __iomem *addr)
 		__flush_PCI_writes();
 }
 
+#define writeb_relaxed writeb
+#define writew_relaxed writew
+#define writel_relaxed writel
 
 /* Values for nocacheflag and cmode */
 #define IOMAP_FULL_CACHING		0
-- 
2.1.0

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