RT PREEMPT patches?

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Hi,make Nios's machine dependent codes which are very similar for SMP systems.Kazu

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I feel that doing SMP System code for NIOS is a real challenge, as NIOS does not fave atomic instructions. I did some research on how it could be possible to provide a kind of Mutex with custom instructions that could be used to protect instruction sequences to make them atomic. I suppose this is possible and extensible to multiple CPUs, but you do need additional "hardware" to do this and I did not exactly proof that it might work.

Do you think this is needed to apply the CONFIG_PREEMPT_RT patch ?

-Michael