1 files changed, 27 insertions, 0 deletions

diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h
index a1f17abba7dc..3d7a6687d247 100644
--- a/include/linux/etherdevice.h
+++ b/include/linux/etherdevice.h
@@ -182,6 +182,33 @@ static inline unsigned compare_ether_addr_64bits(const u8 addr1[6+2],
         return compare_ether_addr(addr1, addr2);
 #endif
 }
+
+/**
+ * is_etherdev_addr - Tell if given Ethernet address belongs to the device.
+ * @dev: Pointer to a device structure
+ * @addr: Pointer to a six-byte array containing the Ethernet address
+ *
+ * Compare passed address with all addresses of the device. Return true if the
+ * address if one of the device addresses.
+ *
+ * Note that this function calls compare_ether_addr_64bits() so take care of
+ * the right padding.
+ */
+static inline bool is_etherdev_addr(const struct net_device *dev,
+                                    const u8 addr[6 + 2])
+{
+        struct netdev_hw_addr *ha;
+        int res = 1;
+
+        rcu_read_lock();
+        for_each_dev_addr(dev, ha) {
+                res = compare_ether_addr_64bits(addr, ha->addr);
+                if (!res)
+                        break;
+        }
+        rcu_read_unlock();
+        return !res;
+}
 #endif  /* __KERNEL__ */
 
 /**