xfrm: make xfrm modes builtin

after previous changes, xfrm_mode contains no function pointers anymore
and all modules defining such struct contain no code except an init/exit
functions to register the xfrm_mode struct with the xfrm core.

Just place the xfrm modes core and remove the modules,
the run-time xfrm_mode register/unregister functionality is removed.

Before:

    text    data     bss      dec filename
    7523     200    2364    10087 net/xfrm/xfrm_input.o
   40003     628     440    41071 net/xfrm/xfrm_state.o
15730338 6937080 4046908 26714326 vmlinux

    7389     200    2364    9953  net/xfrm/xfrm_input.o
   40574     656     440   41670  net/xfrm/xfrm_state.o
15730084 6937068 4046908 26714060 vmlinux

The xfrm*_mode_{transport,tunnel,beet} modules are gone.

v2: replace CONFIG_INET6_XFRM_MODE_* IS_ENABLED guards with CONFIG_IPV6
    ones rather than removing them.

Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

1 files changed, 0 insertions, 36 deletions

diff --git a/net/ipv4/xfrm4_mode_transport.c b/net/ipv4/xfrm4_mode_transport.c
deleted file mode 100644
index 397863ea762b..000000000000
--- a/net/ipv4/xfrm4_mode_transport.c
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
- * xfrm4_mode_transport.c - Transport mode encapsulation for IPv4.
- *
- * Copyright (c) 2004-2006 Herbert Xu <herbert@gondor.apana.org.au>
- */
-
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/skbuff.h>
-#include <linux/stringify.h>
-#include <net/dst.h>
-#include <net/ip.h>
-#include <net/xfrm.h>
-#include <net/protocol.h>
-
-static struct xfrm_mode xfrm4_transport_mode = {
-	.owner = THIS_MODULE,
-	.encap = XFRM_MODE_TRANSPORT,
-	.family = AF_INET,
-};
-
-static int __init xfrm4_transport_init(void)
-{
-	return xfrm_register_mode(&xfrm4_transport_mode);
-}
-
-static void __exit xfrm4_transport_exit(void)
-{
-	xfrm_unregister_mode(&xfrm4_transport_mode);
-}
-
-module_init(xfrm4_transport_init);
-module_exit(xfrm4_transport_exit);
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_XFRM_MODE(AF_INET, XFRM_MODE_TRANSPORT);