diff options
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index cf0923579af4..ae5e260911e2 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1775,7 +1775,7 @@ enum netdev_priv_flags { * for hardware timestamping * @sfp_bus: attached &struct sfp_bus structure. * @qdisc_tx_busylock_key: lockdep class annotating Qdisc->busylock - spinlock + * spinlock * @qdisc_running_key: lockdep class annotating Qdisc->running seqcount * @qdisc_xmit_lock_key: lockdep class annotating * netdev_queue->_xmit_lock spinlock @@ -1881,6 +1881,11 @@ struct net_device { unsigned char if_port; unsigned char dma; + /* Note : dev->mtu is often read without holding a lock. + * Writers usually hold RTNL. + * It is recommended to use READ_ONCE() to annotate the reads, + * and to use WRITE_ONCE() to annotate the writes. + */ unsigned int mtu; unsigned int min_mtu; unsigned int max_mtu; |