diff options
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 40b830d55fe5..31fc54757bf2 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1718,6 +1718,11 @@ 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; @@ -3308,6 +3313,7 @@ int dev_set_alias(struct net_device *, const char *, size_t); int dev_change_net_namespace(struct net_device *, struct net *, const char *); int __dev_set_mtu(struct net_device *, int); int dev_set_mtu(struct net_device *, int); +int dev_validate_mtu(struct net_device *dev, int mtu); void dev_set_group(struct net_device *, int); int dev_set_mac_address(struct net_device *, struct sockaddr *); int dev_change_carrier(struct net_device *, bool new_carrier); @@ -3522,7 +3528,7 @@ static inline u32 netif_msg_init(int debug_value, int default_msg_enable_bits) if (debug_value == 0) /* no output */ return 0; /* set low N bits */ - return (1 << debug_value) - 1; + return (1U << debug_value) - 1; } static inline void __netif_tx_lock(struct netdev_queue *txq, int cpu) |