alloc_etherdev, alloc_netdev. These reserve extra space for driver
private data which gets freed when the network device is freed. If
separately allocated data is attached to the network device
-(dev->priv) then it is up to the module exit handler to free that.
+(netdev_priv(dev)) then it is up to the module exit handler to free that.
MTU
===
has to lock by itself when needed. It is recommended to use a try lock
for this and return NETDEV_TX_LOCKED when the spin lock fails.
The locking there should also properly protect against
- set_multicast_list.
+ set_multicast_list. Note that the use of NETIF_F_LLTX is deprecated.
+ Dont use it for new drivers.
Context: Process with BHs disabled or BH (timer),
will be called with interrupts disabled by netconsole.
Synchronization: netif_tx_lock spinlock.
Context: BHs disabled
-dev->poll:
- Synchronization: __LINK_STATE_RX_SCHED bit in dev->state. See
- dev_close code and comments in net/core/dev.c for more info.
+struct napi_struct synchronization rules
+========================================
+napi->poll:
+ Synchronization: NAPI_STATE_SCHED bit in napi->state. Device
+ driver's dev->close method will invoke napi_disable() on
+ all NAPI instances which will do a sleeping poll on the
+ NAPI_STATE_SCHED napi->state bit, waiting for all pending
+ NAPI activity to cease.
Context: softirq
will be called with interrupts disabled by netconsole.
-