alpha: io: implement relaxed accessor macros for writes
authorWill Deacon <will.deacon@arm.com>
Fri, 25 Jul 2014 00:53:54 +0000 (17:53 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 29 Aug 2014 18:18:45 +0000 (11:18 -0700)
write{b,w,l,q}_relaxed are implemented by some architectures in order to
permit memory-mapped I/O writes with weaker barrier semantics than the
non-relaxed variants.

This patch implements these write macros for Alpha, in the same vein as
the relaxed read macros, which are already implemented.

Acked-by: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/alpha/include/asm/io.h

index 5ebab5895edb7991e660104d8288514d77fdf2c3..f05bdb4b1cb97ee8f0d3bbec58fbc7285522c852 100644 (file)
@@ -500,10 +500,14 @@ extern inline void writeq(u64 b, volatile void __iomem *addr)
 #define outb_p         outb
 #define outw_p         outw
 #define outl_p         outl
-#define readb_relaxed(addr) __raw_readb(addr)
-#define readw_relaxed(addr) __raw_readw(addr)
-#define readl_relaxed(addr) __raw_readl(addr)
-#define readq_relaxed(addr) __raw_readq(addr)
+#define readb_relaxed(addr)    __raw_readb(addr)
+#define readw_relaxed(addr)    __raw_readw(addr)
+#define readl_relaxed(addr)    __raw_readl(addr)
+#define readq_relaxed(addr)    __raw_readq(addr)
+#define writeb_relaxed(b, addr)        __raw_writeb(b, addr)
+#define writew_relaxed(b, addr)        __raw_writew(b, addr)
+#define writel_relaxed(b, addr)        __raw_writel(b, addr)
+#define writeq_relaxed(b, addr)        __raw_writeq(b, addr)
 
 #define mmiowb()