[LLC]: Use refcounting with struct llc_sap
Signed-off-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
diff --git a/include/net/llc.h b/include/net/llc.h
index 8b8e2be..93e5b44 100644
--- a/include/net/llc.h
+++ b/include/net/llc.h
@@ -17,6 +17,8 @@
#include <linux/list.h>
#include <linux/spinlock.h>
+#include <asm/atomic.h>
+
struct net_device;
struct packet_type;
struct sk_buff;
@@ -44,6 +46,7 @@
unsigned char state;
unsigned char p_bit;
unsigned char f_bit;
+ atomic_t refcnt;
int (*rcv_func)(struct sk_buff *skb,
struct net_device *dev,
struct packet_type *pt,
@@ -81,7 +84,18 @@
struct net_device *dev,
struct packet_type *pt,
struct net_device *orig_dev));
-extern void llc_sap_close(struct llc_sap *sap);
+static inline void llc_sap_hold(struct llc_sap *sap)
+{
+ atomic_inc(&sap->refcnt);
+}
+
+static inline void llc_sap_put(struct llc_sap *sap)
+{
+ extern void llc_sap_close(struct llc_sap *sap);
+
+ if (atomic_dec_and_test(&sap->refcnt))
+ llc_sap_close(sap);
+}
extern struct llc_sap *llc_sap_find(unsigned char sap_value);