diff options
| author | Jiri Pirko <jpirko@redhat.com> | 2012-01-09 06:36:54 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-01-09 12:46:58 -0800 |
| commit | 2429f7ac2ef429378536d87fcbbf6f424aa5b47f (patch) | |
| tree | 15e0fd0c42f6e10ede9f1cf84553c2a01e593d81 /include | |
| parent | ab16ebf375f0513d6b0f5193de84186a3fc0c33b (diff) | |
net: introduce netif_addr_lock_nested() and call if when appropriate
dev_uc_sync() and dev_mc_sync() are acquiring netif_addr_lock for
destination device of synchronization. Since netif_addr_lock is
already held at the time for source device, this triggers lockdep
deadlock warning.
There's no way this deadlock can happen so use spin_lock_nested() to
silence the warning.
Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/netdevice.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index a1d109590da4..d0522bb2d4a0 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -2450,6 +2450,11 @@ static inline void netif_addr_lock(struct net_device *dev) spin_lock(&dev->addr_list_lock); } +static inline void netif_addr_lock_nested(struct net_device *dev) +{ + spin_lock_nested(&dev->addr_list_lock, SINGLE_DEPTH_NESTING); +} + static inline void netif_addr_lock_bh(struct net_device *dev) { spin_lock_bh(&dev->addr_list_lock); |