[avr-chat] portable no-op with AVR GCC, AVR LIbc?

[Britton Kerin]

I notice the AVR Libc include/compat/ina90.h has this:

  #define _NOP() do { __asm__ __volatile__ ("nop"); } while (0)

but I didn't find anything else "nop"ish.  I generally don't include ina90.h.
Is there some good concise GCC/AVRLibc way to write nop that I missed?

Thanks,
Britton