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authorZhouyi Zhou <zhouzhouyi@gmail.com>2014-08-22 10:40:15 +0800
committerPablo Neira Ayuso <pablo@netfilter.org>2014-08-25 10:45:28 +0200
commitd1c85c2ebe7ffe1f1b27846bd1ba0944c513d822 (patch)
tree453ec7871afc5de44b46fb3be68967d5f000133d
parent1e8430f30b55a1f3f6925c9f37f8cc9afd141d2e (diff)
netfilter: HAVE_JUMP_LABEL instead of CONFIG_JUMP_LABEL
Use HAVE_JUMP_LABEL as elsewhere in the kernel to ensure that the toolchain has the required support in addition to CONFIG_JUMP_LABEL being set. Signed-off-by: Zhouyi Zhou <yizhouzhou@ict.ac.cn> Reviewed-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
-rw-r--r--include/linux/netfilter.h5
-rw-r--r--net/netfilter/core.c6
2 files changed, 6 insertions, 5 deletions
diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
index 2077489f9887..2517ece98820 100644
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -9,6 +9,7 @@
#include <linux/in6.h>
#include <linux/wait.h>
#include <linux/list.h>
+#include <linux/static_key.h>
#include <uapi/linux/netfilter.h>
#ifdef CONFIG_NETFILTER
static inline int NF_DROP_GETERR(int verdict)
@@ -99,9 +100,9 @@ void nf_unregister_sockopt(struct nf_sockopt_ops *reg);
extern struct list_head nf_hooks[NFPROTO_NUMPROTO][NF_MAX_HOOKS];
-#if defined(CONFIG_JUMP_LABEL)
-#include <linux/static_key.h>
+#ifdef HAVE_JUMP_LABEL
extern struct static_key nf_hooks_needed[NFPROTO_NUMPROTO][NF_MAX_HOOKS];
+
static inline bool nf_hooks_active(u_int8_t pf, unsigned int hook)
{
if (__builtin_constant_p(pf) &&
diff --git a/net/netfilter/core.c b/net/netfilter/core.c
index a93c97f106d4..024a2e25c8a4 100644
--- a/net/netfilter/core.c
+++ b/net/netfilter/core.c
@@ -54,7 +54,7 @@ EXPORT_SYMBOL_GPL(nf_unregister_afinfo);
struct list_head nf_hooks[NFPROTO_NUMPROTO][NF_MAX_HOOKS] __read_mostly;
EXPORT_SYMBOL(nf_hooks);
-#if defined(CONFIG_JUMP_LABEL)
+#ifdef HAVE_JUMP_LABEL
struct static_key nf_hooks_needed[NFPROTO_NUMPROTO][NF_MAX_HOOKS];
EXPORT_SYMBOL(nf_hooks_needed);
#endif
@@ -72,7 +72,7 @@ int nf_register_hook(struct nf_hook_ops *reg)
}
list_add_rcu(&reg->list, elem->list.prev);
mutex_unlock(&nf_hook_mutex);
-#if defined(CONFIG_JUMP_LABEL)
+#ifdef HAVE_JUMP_LABEL
static_key_slow_inc(&nf_hooks_needed[reg->pf][reg->hooknum]);
#endif
return 0;
@@ -84,7 +84,7 @@ void nf_unregister_hook(struct nf_hook_ops *reg)
mutex_lock(&nf_hook_mutex);
list_del_rcu(&reg->list);
mutex_unlock(&nf_hook_mutex);
-#if defined(CONFIG_JUMP_LABEL)
+#ifdef HAVE_JUMP_LABEL
static_key_slow_dec(&nf_hooks_needed[reg->pf][reg->hooknum]);
#endif
synchronize_net();