Hi Yuri & Kuan-Wei: > Thank you for sharing your opinion on this fixed parity(). Your > arguments may or may not be important, depending on what existing > users actually need. Unfortunately, Kuan-Wei didn't collect > performance numbers and opinions from those proposed users.
For the fsi-i2c side: this isn't a performance-critical path, and any reasonable common approach would likely perform better that the current per-bit implementation. Our common targets for this driver would be arm and powerpc64le. In case it's useful as a reference, using the kernel compilers I have to hand, a __builtin_parity() is a library call on the former, and a two-instruction sequence for the latter. Cheers, Jeremy
