net: Remove __KERNEL__ cpp checks from include/net

These header files are never installed to user consumption, so any
__KERNEL__ cpp checks are superfluous.

Projects should also not copy these files into their userland utility
sources and try to use them there.  If they insist on doing so, the
onus is on them to sanitize the headers as needed.

Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/netfilter/nf_conntrack.h

@@ -14,7 +14,6 @@
 
 #include <linux/netfilter/nf_conntrack_common.h>
 
-#ifdef __KERNEL__
 #include <linux/bitops.h>
 #include <linux/compiler.h>
 #include <asm/atomic.h>
@@ -326,5 +325,4 @@ do {							\
 #define MODULE_ALIAS_NFCT_HELPER(helper) \
         MODULE_ALIAS("nfct-helper-" helper)
 
-#endif /* __KERNEL__ */
 #endif /* _NF_CONNTRACK_H */

include/net/netfilter/nf_conntrack_tuple.h

@@ -104,8 +104,6 @@ struct nf_conntrack_tuple_mask {
 	} src;
 };
 
-#ifdef __KERNEL__
-
 static inline void nf_ct_dump_tuple_ip(const struct nf_conntrack_tuple *t)
 {
 #ifdef DEBUG
@@ -148,8 +146,6 @@ struct nf_conntrack_tuple_hash {
 	struct nf_conntrack_tuple tuple;
 };
 
-#endif /* __KERNEL__ */
-
 static inline bool __nf_ct_tuple_src_equal(const struct nf_conntrack_tuple *t1,
 					   const struct nf_conntrack_tuple *t2)
 { 

include/net/netfilter/nf_nat.h

@@ -48,7 +48,6 @@ struct nf_nat_multi_range_compat {
 	struct nf_nat_range range[1];
 };
 
-#ifdef __KERNEL__
 #include <linux/list.h>
 #include <linux/netfilter/nf_conntrack_pptp.h>
 #include <net/netfilter/nf_conntrack_extend.h>
@@ -93,7 +92,4 @@ static inline struct nf_conn_nat *nfct_nat(const struct nf_conn *ct)
 #endif
 }
 
-#else  /* !__KERNEL__: iptables wants this to compile. */
-#define nf_nat_multi_range nf_nat_multi_range_compat
-#endif /*__KERNEL__*/
 #endif