diff options
| author | James Chapman <jchapman@katalix.com> | 2010-04-02 06:19:05 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-04-03 14:56:05 -0700 |
| commit | f408e0ce40270559ef80f231843c93baa9947bc5 (patch) | |
| tree | 0a71cda13657bd3c058ed110714f4ac829a50ad2 | |
| parent | 0d76751fad7739014485ba5bd388d4f1b4fd4143 (diff) | |
netlink: Export genl_lock() API for use by modules
This lets kernel modules which use genl netlink APIs serialize netlink
processing.
Signed-off-by: James Chapman <jchapman@katalix.com>
Reviewed-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/linux/genetlink.h | 8 | ||||
| -rw-r--r-- | net/netlink/genetlink.c | 6 |
2 files changed, 12 insertions, 2 deletions
diff --git a/include/linux/genetlink.h b/include/linux/genetlink.h index b834ef6d59fa..61549b26ad6f 100644 --- a/include/linux/genetlink.h +++ b/include/linux/genetlink.h @@ -80,4 +80,12 @@ enum { #define CTRL_ATTR_MCAST_GRP_MAX (__CTRL_ATTR_MCAST_GRP_MAX - 1) +#ifdef __KERNEL__ + +/* All generic netlink requests are serialized by a global lock. */ +extern void genl_lock(void); +extern void genl_unlock(void); + +#endif /* __KERNEL__ */ + #endif /* __LINUX_GENERIC_NETLINK_H */ diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c index a4b6e148c5de..a28fda7420d9 100644 --- a/net/netlink/genetlink.c +++ b/net/netlink/genetlink.c @@ -20,15 +20,17 @@ static DEFINE_MUTEX(genl_mutex); /* serialization of message processing */ -static inline void genl_lock(void) +void genl_lock(void) { mutex_lock(&genl_mutex); } +EXPORT_SYMBOL(genl_lock); -static inline void genl_unlock(void) +void genl_unlock(void) { mutex_unlock(&genl_mutex); } +EXPORT_SYMBOL(genl_unlock); #define GENL_FAM_TAB_SIZE 16 #define GENL_FAM_TAB_MASK (GENL_FAM_TAB_SIZE - 1) |