diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/netdevice.h | 38 |
1 files changed, 35 insertions, 3 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index b5760c67af9c..067b9ccafd87 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -407,7 +407,7 @@ struct net_device * One part is mostly used on xmit path (device) */ /* hard_start_xmit synchronizer */ - spinlock_t xmit_lock ____cacheline_aligned_in_smp; + spinlock_t _xmit_lock ____cacheline_aligned_in_smp; /* cpu id of processor entered to hard_start_xmit or -1, if nobody entered there. */ @@ -893,11 +893,43 @@ static inline void __netif_rx_complete(struct net_device *dev) clear_bit(__LINK_STATE_RX_SCHED, &dev->state); } +static inline void netif_tx_lock(struct net_device *dev) +{ + spin_lock(&dev->_xmit_lock); + dev->xmit_lock_owner = smp_processor_id(); +} + +static inline void netif_tx_lock_bh(struct net_device *dev) +{ + spin_lock_bh(&dev->_xmit_lock); + dev->xmit_lock_owner = smp_processor_id(); +} + +static inline int netif_tx_trylock(struct net_device *dev) +{ + int err = spin_trylock(&dev->_xmit_lock); + if (!err) + dev->xmit_lock_owner = smp_processor_id(); + return err; +} + +static inline void netif_tx_unlock(struct net_device *dev) +{ + dev->xmit_lock_owner = -1; + spin_unlock(&dev->_xmit_lock); +} + +static inline void netif_tx_unlock_bh(struct net_device *dev) +{ + dev->xmit_lock_owner = -1; + spin_unlock_bh(&dev->_xmit_lock); +} + static inline void netif_tx_disable(struct net_device *dev) { - spin_lock_bh(&dev->xmit_lock); + netif_tx_lock_bh(dev); netif_stop_queue(dev); - spin_unlock_bh(&dev->xmit_lock); + netif_tx_unlock_bh(dev); } /* These functions live elsewhere (drivers/net/net_init.c, but related) */ |