net: ipv4: remove disable of bottom half in inet_rtm_getroute

Nothing about the route lookup requires bottom half to be disabled.
Remove the local_bh_disable ... local_bh_enable around ip_route_input.
This appears to be a vestige of days gone by as it has been there
since the beginning of git time.
Signed-off-by: NDavid Ahern <dsa@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv4/route.c

@@ -2631,9 +2631,7 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh)
 		skb->protocol	= htons(ETH_P_IP);
 		skb->dev	= dev;
 		skb->mark	= mark;
-		local_bh_disable();
 		err = ip_route_input(skb, dst, src, rtm->rtm_tos, dev);
-		local_bh_enable();
 
 		rt = skb_rtable(skb);
 		if (err == 0 && rt->dst.error)