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| author | Arnaldo Carvalho de Melo <acme@mandriva.com> | 2005-09-22 04:43:05 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@mandriva.com> | 2005-09-22 04:43:05 -0300 |
| commit | 6e2144b76840be09924de1626e2dcd7b315f75b3 (patch) | |
| tree | 33044cb63f368270229e2b40aa2ad024325c7e8b /include/net/llc.h | |
| parent | 04e4223f44b89e50f275cb6b95a58ebe2c4909be (diff) | |
| download | lwn-6e2144b76840be09924de1626e2dcd7b315f75b3.tar.gz lwn-6e2144b76840be09924de1626e2dcd7b315f75b3.zip | |
[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>
Diffstat (limited to 'include/net/llc.h')
| -rw-r--r-- | include/net/llc.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/include/net/llc.h b/include/net/llc.h index 8b8e2be289b1..93e5b443a9a7 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 @@ struct llc_sap { 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 @@ extern struct llc_sap *llc_sap_open(unsigned char lsap, 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); |