[NETFILTER]: More __read_mostly annotations

Place rarely written variables in the read-mostly section by using
__read_mostly

Signed-off-by: Martin Josefsson <gandalf@wlug.westbo.se>
Signed-off-by: Patrick McHardy <kaber@trash.net>

net/netfilter/core.c

@@ -28,7 +28,7 @@
 
 static DEFINE_SPINLOCK(afinfo_lock);
 
-struct nf_afinfo *nf_afinfo[NPROTO];
+struct nf_afinfo *nf_afinfo[NPROTO] __read_mostly;
 EXPORT_SYMBOL(nf_afinfo);
 
 int nf_register_afinfo(struct nf_afinfo *afinfo)
@@ -54,7 +54,7 @@ EXPORT_SYMBOL_GPL(nf_unregister_afinfo);
  * of skbuffs queued for userspace, and not deregister a hook unless
  * this is zero, but that sucks.  Now, we simply check when the
  * packets come back: if the hook is gone, the packet is discarded. */
-struct list_head nf_hooks[NPROTO][NF_MAX_HOOKS];
+struct list_head nf_hooks[NPROTO][NF_MAX_HOOKS] __read_mostly;
 EXPORT_SYMBOL(nf_hooks);
 static DEFINE_SPINLOCK(nf_hook_lock);
 

net/netfilter/nf_conntrack_core.c

@@ -73,10 +73,10 @@ DEFINE_RWLOCK(nf_conntrack_lock);
 atomic_t nf_conntrack_count = ATOMIC_INIT(0);
 
 void (*nf_conntrack_destroyed)(struct nf_conn *conntrack) = NULL;
-unsigned int nf_conntrack_htable_size __read_mostly = 0;
+unsigned int nf_conntrack_htable_size __read_mostly;
 int nf_conntrack_max __read_mostly;
 struct list_head *nf_conntrack_hash __read_mostly;
-struct nf_conn nf_conntrack_untracked;
+struct nf_conn nf_conntrack_untracked __read_mostly;
 unsigned int nf_ct_log_invalid __read_mostly;
 LIST_HEAD(unconfirmed);
 static int nf_conntrack_vmalloc __read_mostly;

net/netfilter/nf_conntrack_helper.c

@@ -30,7 +30,7 @@
 #include <net/netfilter/nf_conntrack_helper.h>
 #include <net/netfilter/nf_conntrack_core.h>
 
-static LIST_HEAD(helpers);
+static __read_mostly LIST_HEAD(helpers);
 
 struct nf_conntrack_helper *
 __nf_ct_helper_find(const struct nf_conntrack_tuple *tuple)