[V5 PATCH 26/26] mempolicy: fix is_valid_nodemask()

is_valid_nodemask() is introduced by 19770b32. but it does not match its comments, because it does not check the zone which > policy_zone. Also in b377fd, this commits told us, if highest zone is ZONE_MOVABLE, we should also apply memory policies to it. so ZONE_MOVABLE should be valid zone for

[V5 PATCH 26/26] mempolicy: fix is_valid_nodemask()

is_valid_nodemask() is introduced by 19770b32. but it does not match its comments, because it does not check the zone which policy_zone. Also in b377fd, this commits told us, if highest zone is ZONE_MOVABLE, we should also apply memory policies to it. so ZONE_MOVABLE should be valid zone for