[IPSEC]: Move xfrm6 policy code to net/ipv4/xfrm_policy.c

net/ipv4/xfrm_policy.c

+#include <linux/config.h>
 #include <net/xfrm.h>
 #include <net/ip.h>
 
@@ -198,6 +199,49 @@ struct xfrm_type *xfrm_get_type(u8 proto)
 	return type;
 }
 
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+static struct xfrm_type *xfrm6_type_map[256];
+static rwlock_t xfrm6_type_lock = RW_LOCK_UNLOCKED;
+
+int xfrm6_register_type(struct xfrm_type *type)
+{
+	int err = 0;
+
+	write_lock(&xfrm6_type_lock);
+	if (xfrm6_type_map[type->proto] == NULL)
+		xfrm6_type_map[type->proto] = type;
+	else
+		err = -EEXIST;
+	write_unlock(&xfrm6_type_lock);
+	return err;
+}
+
+int xfrm6_unregister_type(struct xfrm_type *type)
+{
+	int err = 0;
+
+	write_lock(&xfrm6_type_lock);
+	if (xfrm6_type_map[type->proto] != type)
+		err = -ENOENT;
+	else
+		xfrm6_type_map[type->proto] = NULL;
+	write_unlock(&xfrm6_type_lock);
+	return err;
+}
+
+struct xfrm_type *xfrm6_get_type(u8 proto)
+{
+	struct xfrm_type *type;
+
+	read_lock(&xfrm6_type_lock);
+	type = xfrm6_type_map[proto];
+	if (type && !try_module_get(type->owner))
+		type = NULL;
+	read_unlock(&xfrm6_type_lock);
+	return type;
+}
+#endif /* CONFIG_IPV6 || CONFIG_IPV6_MODULE */
+
 void xfrm_put_type(struct xfrm_type *type)
 {
 	module_put(type->owner);

net/ipv6/Makefile

@@ -11,5 +11,3 @@ ipv6-objs :=	af_inet6.o ip6_output.o ip6_input.o addrconf.o sit.o \
 		ip6_flowlabel.o ipv6_syms.o
 
 obj-$(CONFIG_NETFILTER)	+= netfilter/
-
-obj-y += xfrm_policy.o

net/ipv6/xfrm_policy.c

-#include <net/xfrm.h>
-#include <net/ip.h>
-
-static struct xfrm_type *xfrm6_type_map[256];
-static rwlock_t xfrm6_type_lock = RW_LOCK_UNLOCKED;
-
-int xfrm6_register_type(struct xfrm_type *type)
-{
-	int err = 0;
-
-	write_lock(&xfrm6_type_lock);
-	if (xfrm6_type_map[type->proto] == NULL)
-		xfrm6_type_map[type->proto] = type;
-	else
-		err = -EEXIST;
-	write_unlock(&xfrm6_type_lock);
-	return err;
-}
-
-int xfrm6_unregister_type(struct xfrm_type *type)
-{
-	int err = 0;
-
-	write_lock(&xfrm6_type_lock);
-	if (xfrm6_type_map[type->proto] != type)
-		err = -ENOENT;
-	else
-		xfrm6_type_map[type->proto] = NULL;
-	write_unlock(&xfrm6_type_lock);
-	return err;
-}
-
-struct xfrm_type *xfrm6_get_type(u8 proto)
-{
-	struct xfrm_type *type;
-
-	read_lock(&xfrm6_type_lock);
-	type = xfrm6_type_map[proto];
-	if (type && !try_module_get(type->owner))
-		type = NULL;
-	read_unlock(&xfrm6_type_lock);
-	return type;
-}