Zero copy between ISR, kernel and User

[Wink Saville]

Hello,

I would like to allow the transferring of data between ISR's, kernel and 
user code, without requiring copying. I envision allocating buffers in 
the kernel and then mapping them so that they appear at the same 
addresses to all code, and never being swapped out of memory.

Is this feasible for all supported Linux architectures and is there 
existing code that someone could point me towards?

Regards,

Wink Saville

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