[AVR32] Define mmiowb()

Add empty definition of mmiowb() since some drivers need it. Uncached
writes are strongly ordered on AVR32. They may be delayed if the
dcache is busy doing a writeback, but AFAICT that's not what this
macro is supposed to deal with, at least on UP systems.

We might have to revisit this definition when a SMP-capable AVR32 CPU
comes along, depending on how the busses and cache coherency stuff
end up being implemented.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>

diff --git a/include/asm-avr32/io.h b/include/asm-avr32/io.h
index e30d4b3bd83610d40628e70345dc786f09e75c3a..64bb92bb677338ec3c2ee872e0431719fb16bc91 100644 (file)
--- a/include/asm-avr32/io.h
+++ b/include/asm-avr32/io.h
@@ -255,6 +255,8 @@ static inline void memset_io(volatile void __iomem *addr, unsigned char val,
        memset((void __force *)addr, val, count);
 }
 
+#define mmiowb()
+
 #define IO_SPACE_LIMIT 0xffffffff
 
 extern void __iomem *__ioremap(unsigned long offset, size_t size,