This patch replaces the open coded version with Linux's existing hweight
functions.
The original version checked each of the low four bits, accumulating and
returning the result. Instead, use a mask to select those four bits, and
pass the result to hweight8.
It also makes the code in this function simpler.
Signed-off-by: Tapasweni Pathak <tapaswenipathak@gmail.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
4ecdc381d7