On Sat, Dec 14, 2024 at 9:59 AM Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx> wrote: > There are multiple open coded implementations for getting the parity of > a byte in the kernel, even using different approaches. Take the pretty > efficient version from SPD5118 driver and make it generally available by > putting it into the bitops header. As long as there is just one parity > calculation helper, the creation of a distinct 'parity.h' header was > discarded. Also, the usage of hweight8() for architectures having a > popcnt instruction is postponed until a use case within hot paths is > desired. The motivation for this patch is the frequent use of odd parity > in the I3C specification and to simplify drivers there. > > Changes compared to the original SPD5118 version are the addition of > kernel documentation, switching the return type from bool to int, and > renaming the argument of the function. > > Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx> Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds