[POWERPC] spufs: don't yield CPU in spu_yield
There is no reason to yield the CPU in spu_yield - if the backing thread reenters spu_run it gets added to the end of the runqueue for it's priority. So the yield is just a slowdown for the case where we have higher priority contexts waiting. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
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