[PATCH v2 1/2] powerpc/rtas: rtas_busy_delay() improvements

[Nathan Lynch]

Nathan Lynch <nathanl at linux.ibm.com> writes:
>
> Signed-off-by: Nathan Lynch <nathanl at linux.ibm.com>
> ---
>
> Notes:
>     This could be considered a sequel to:
>     
>     https://lore.kernel.org/linuxppc-dev/20210504030358.1715034-1-nathanl@linux.ibm.com/
>     
>     which tried to address both the suboptimal delay behavior as well as naming
>     issues. The present change achieves the performance improvement and leaves
>     the matter of naming for another time.
>     
>     I've incorporated Alexey's feedback from that series to avoid division when
>     calculating the arguments to usleep_range().

Oops, this part is redundant with information in the cover. Git should
discard it if/when applied, though.