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[AVR32] Define mmiowb()

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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>
This commit is contained in:
Haavard Skinnemoen 2007-08-13 16:24:01 +02:00
parent 6f834197a7
commit cca67164bb
1 changed files with 2 additions and 0 deletions
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include/asm-avr32/io.h
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@ -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,