}
EXPORT_SYMBOL(dev_set_mac_address);
-static DECLARE_RWSEM(dev_addr_sem);
+DECLARE_RWSEM(dev_addr_sem);
int dev_set_mac_address_user(struct net_device *dev, struct sockaddr *sa,
struct netlink_ext_ack *extack)
#define _NET_CORE_DEV_H
#include <linux/types.h>
+#include <linux/rwsem.h>
struct net;
struct net_device;
extern int dev_weight_rx_bias;
extern int dev_weight_tx_bias;
+extern struct rw_semaphore dev_addr_sem;
+
/* rtnl helpers */
extern struct list_head net_todo_list;
void netdev_run_todo(void);
}
static DEVICE_ATTR_RO(name_assign_type);
-/* use same locking rules as GIFHWADDR ioctl's */
+/* use same locking rules as GIFHWADDR ioctl's (dev_get_mac_address()) */
static ssize_t address_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct net_device *ndev = to_net_dev(dev);
ssize_t ret = -EINVAL;
- read_lock(&dev_base_lock);
+ down_read(&dev_addr_sem);
+
+ rcu_read_lock();
if (dev_isalive(ndev))
ret = sysfs_format_mac(buf, ndev->dev_addr, ndev->addr_len);
- read_unlock(&dev_base_lock);
+ rcu_read_unlock();
+
+ up_read(&dev_addr_sem);
return ret;
}
static DEVICE_ATTR_RO(address);