Merge branch 'io' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into asm-generic
* 'io' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux:
documentation: memory-barriers: clarify relaxed io accessor semantics
x86: io: implement dummy relaxed accessor macros for writes
tile: io: implement dummy relaxed accessor macros for writes
sparc: io: implement dummy relaxed accessor macros for writes
powerpc: io: implement dummy relaxed accessor macros for writes
parisc: io: implement dummy relaxed accessor macros for writes
mn10300: io: implement dummy relaxed accessor macros for writes
m68k: io: implement dummy relaxed accessor macros for writes
m32r: io: implement dummy relaxed accessor macros for writes
ia64: io: implement dummy relaxed accessor macros for writes
cris: io: implement dummy relaxed accessor macros for writes
frv: io: implement dummy relaxed accessor macros for writes
xtensa: io: remove dummy relaxed accessor macros for reads
s390: io: remove dummy relaxed accessor macros for reads
microblaze: io: remove dummy relaxed accessor macros
asm-generic: io: implement relaxed accessor macros as conditional wrappers
Conflicts:
include/asm-generic/io.h
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index 00483d7..9db0423 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -175,6 +175,43 @@
#endif /* CONFIG_64BIT */
/*
+ * {read,write}{b,w,l,q}_relaxed() are like the regular version, but
+ * are not guaranteed to provide ordering against spinlocks or memory
+ * accesses.
+ */
+#ifndef readb_relaxed
+#define readb_relaxed readb
+#endif
+
+#ifndef readw_relaxed
+#define readw_relaxed readw
+#endif
+
+#ifndef readl_relaxed
+#define readl_relaxed readl
+#endif
+
+#ifndef readq_relaxed
+#define readq_relaxed readq
+#endif
+
+#ifndef writeb_relaxed
+#define writeb_relaxed writeb
+#endif
+
+#ifndef writew_relaxed
+#define writew_relaxed writew
+#endif
+
+#ifndef writel_relaxed
+#define writel_relaxed writel
+#endif
+
+#ifndef writeq_relaxed
+#define writeq_relaxed writeq
+#endif
+
+/*
* {read,write}s{b,w,l,q}() repeatedly access the same memory address in
* native endianness in 8-, 16-, 32- or 64-bit chunks (@count times).
*/
