bpf: move bpf_jit_enable declaration

Move the bpf_jit_enable declaration to the filter.h file where
most other core code is declared, also since we're going to add
a second knob there.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/filter.h

@@ -496,6 +496,8 @@ void bpf_int_jit_compile(struct bpf_prog *fp);
 bool bpf_helper_changes_skb_data(void *func);
 
 #ifdef CONFIG_BPF_JIT
+extern int bpf_jit_enable;
+
 typedef void (*bpf_jit_fill_hole_t)(void *area, unsigned int size);
 
 struct bpf_binary_header *

include/linux/netdevice.h

@@ -3759,7 +3759,6 @@ void netdev_stats_to_stats64(struct rtnl_link_stats64 *stats64,
 extern int		netdev_max_backlog;
 extern int		netdev_tstamp_prequeue;
 extern int		weight_p;
-extern int		bpf_jit_enable;
 
 bool netdev_has_upper_dev(struct net_device *dev, struct net_device *upper_dev);
 struct net_device *netdev_upper_get_next_dev_rcu(struct net_device *dev,