Currently sparc and sparc64's UP cpu_idle() checks current pid. This
is old time legacy. Now it's paranoia.
Signed-off-by: NCoywolf Qi Hunt <coywolf@lovecn.org>
Acked-by: NWilliam Irwin <wli@holomorphy.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>