net: convert unicast addr list

This patch converts unicast address list to standard list_head using
previously introduced struct netdev_hw_addr. It also relaxes the
locking. Original spinlock (still used for multicast addresses) is not
needed and is no longer used for a protection of this list. All
reading and writing takes place under rtnl (with no changes).

I also removed a possibility to specify the length of the address
while adding or deleting unicast address. It's always dev->addr_len.

The convertion touched especially e1000 and ixgbe codes when the
change is not so trivial.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>

 drivers/net/bnx2.c               |   13 +--
 drivers/net/e1000/e1000_main.c   |   24 +++--
 drivers/net/ixgbe/ixgbe_common.c |   14 ++--
 drivers/net/ixgbe/ixgbe_common.h |    4 +-
 drivers/net/ixgbe/ixgbe_main.c   |    6 +-
 drivers/net/ixgbe/ixgbe_type.h   |    4 +-
 drivers/net/macvlan.c            |   11 +-
 drivers/net/mv643xx_eth.c        |   11 +-
 drivers/net/niu.c                |    7 +-
 drivers/net/virtio_net.c         |    7 +-
 drivers/s390/net/qeth_l2_main.c  |    6 +-
 drivers/scsi/fcoe/fcoe.c         |   16 ++--
 include/linux/netdevice.h        |   18 ++--
 net/8021q/vlan.c                 |    4 +-
 net/8021q/vlan_dev.c             |   10 +-
 net/core/dev.c                   |  195 +++++++++++++++++++++++++++-----------
 net/dsa/slave.c                  |   10 +-
 net/packet/af_packet.c           |    4 +-
 18 files changed, 227 insertions(+), 137 deletions(-)
Signed-off-by: David S. Miller <davem@davemloft.net>

18 files changed, 227 insertions, 137 deletions

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index 83ee0f53f2d2..f53017250e09 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -48,6 +48,7 @@
 #include <linux/cache.h>
 #include <linux/firmware.h>
 #include <linux/log2.h>
+#include <linux/list.h>
 
 #include "bnx2.h"
 #include "bnx2_fw.h"
@@ -3310,7 +3311,7 @@ bnx2_set_rx_mode(struct net_device *dev)
 {
         struct bnx2 *bp = netdev_priv(dev);
         u32 rx_mode, sort_mode;
-        struct dev_addr_list *uc_ptr;
+        struct netdev_hw_addr *ha;
         int i;
 
         if (!netif_running(dev))
@@ -3369,21 +3370,19 @@ bnx2_set_rx_mode(struct net_device *dev)
                 sort_mode |= BNX2_RPM_SORT_USER0_MC_HSH_EN;
         }
 
-        uc_ptr = NULL;
         if (dev->uc_count > BNX2_MAX_UNICAST_ADDRESSES) {
                 rx_mode |= BNX2_EMAC_RX_MODE_PROMISCUOUS;
                 sort_mode |= BNX2_RPM_SORT_USER0_PROM_EN |
                              BNX2_RPM_SORT_USER0_PROM_VLAN;
         } else if (!(dev->flags & IFF_PROMISC)) {
-                uc_ptr = dev->uc_list;
-
                 /* Add all entries into to the match filter list */
-                for (i = 0; i < dev->uc_count; i++) {
-                        bnx2_set_mac_addr(bp, uc_ptr->da_addr,
+                i = 0;
+                list_for_each_entry(ha, &dev->uc_list, list) {
+                        bnx2_set_mac_addr(bp, ha->addr,
                                           i + BNX2_START_UNICAST_ADDRESS_INDEX);
                         sort_mode |= (1 <<
                                       (i + BNX2_START_UNICAST_ADDRESS_INDEX));
-                        uc_ptr = uc_ptr->next;
+                        i++;
                 }
 
         }
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 79fe1ee3da52..74667e521431 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -2330,7 +2330,8 @@ static void e1000_set_rx_mode(struct net_device *netdev)
 {
         struct e1000_adapter *adapter = netdev_priv(netdev);
         struct e1000_hw *hw = &adapter->hw;
-        struct dev_addr_list *uc_ptr;
+        struct netdev_hw_addr *ha;
+        bool use_uc = false;
         struct dev_addr_list *mc_ptr;
         u32 rctl;
         u32 hash_value;
@@ -2369,12 +2370,11 @@ static void e1000_set_rx_mode(struct net_device *netdev)
                         rctl |= E1000_RCTL_VFE;
         }
 
-        uc_ptr = NULL;
         if (netdev->uc_count > rar_entries - 1) {
                 rctl |= E1000_RCTL_UPE;
         } else if (!(netdev->flags & IFF_PROMISC)) {
                 rctl &= ~E1000_RCTL_UPE;
-                uc_ptr = netdev->uc_list;
+                use_uc = true;
         }
 
         ew32(RCTL, rctl);
@@ -2392,13 +2392,20 @@ static void e1000_set_rx_mode(struct net_device *netdev)
          * if there are not 14 addresses, go ahead and clear the filters
          * -- with 82571 controllers only 0-13 entries are filled here
          */
+        i = 1;
+        if (use_uc)
+                list_for_each_entry(ha, &netdev->uc_list, list) {
+                        if (i == rar_entries)
+                                break;
+                        e1000_rar_set(hw, ha->addr, i++);
+                }
+
+        WARN_ON(i == rar_entries);
+
         mc_ptr = netdev->mc_list;
 
-        for (i = 1; i < rar_entries; i++) {
-                if (uc_ptr) {
-                        e1000_rar_set(hw, uc_ptr->da_addr, i);
-                        uc_ptr = uc_ptr->next;
-                } else if (mc_ptr) {
+        for (; i < rar_entries; i++) {
+                if (mc_ptr) {
                         e1000_rar_set(hw, mc_ptr->da_addr, i);
                         mc_ptr = mc_ptr->next;
                 } else {
@@ -2408,7 +2415,6 @@ static void e1000_set_rx_mode(struct net_device *netdev)
                         E1000_WRITE_FLUSH();
                 }
         }
-        WARN_ON(uc_ptr != NULL);
 
         /* load any remaining addresses into the hash table */
 
diff --git a/drivers/net/ixgbe/ixgbe_common.c b/drivers/net/ixgbe/ixgbe_common.c
index 0cc3c47cb453..6f79409270a7 100644
--- a/drivers/net/ixgbe/ixgbe_common.c
+++ b/drivers/net/ixgbe/ixgbe_common.c
@@ -28,6 +28,8 @@
 #include <linux/pci.h>
 #include <linux/delay.h>
 #include <linux/sched.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
 
 #include "ixgbe.h"
 #include "ixgbe_common.h"
@@ -1356,15 +1358,14 @@ static void ixgbe_add_uc_addr(struct ixgbe_hw *hw, u8 *addr, u32 vmdq)
  *  Drivers using secondary unicast addresses must set user_set_promisc when
  *  manually putting the device into promiscuous mode.
  **/
-s32 ixgbe_update_uc_addr_list_generic(struct ixgbe_hw *hw, u8 *addr_list,
-                              u32 addr_count, ixgbe_mc_addr_itr next)
+s32 ixgbe_update_uc_addr_list_generic(struct ixgbe_hw *hw,
+                                      struct list_head *uc_list)
 {
-        u8 *addr;
         u32 i;
         u32 old_promisc_setting = hw->addr_ctrl.overflow_promisc;
         u32 uc_addr_in_use;
         u32 fctrl;
-        u32 vmdq;
+        struct netdev_hw_addr *ha;
 
         /*
          * Clear accounting of old secondary address list,
@@ -1382,10 +1383,9 @@ s32 ixgbe_update_uc_addr_list_generic(struct ixgbe_hw *hw, u8 *addr_list,
         }
 
         /* Add the new addresses */
-        for (i = 0; i < addr_count; i++) {
+        list_for_each_entry(ha, uc_list, list) {
                 hw_dbg(hw, " Adding the secondary addresses:\n");
-                addr = next(hw, &addr_list, &vmdq);
-                ixgbe_add_uc_addr(hw, addr, vmdq);
+                ixgbe_add_uc_addr(hw, ha->addr, 0);
         }
 
         if (hw->addr_ctrl.overflow_promisc) {
diff --git a/drivers/net/ixgbe/ixgbe_common.h b/drivers/net/ixgbe/ixgbe_common.h
index dd260890ad0a..b2a4b2c99c40 100644
--- a/drivers/net/ixgbe/ixgbe_common.h
+++ b/drivers/net/ixgbe/ixgbe_common.h
@@ -59,8 +59,8 @@ s32 ixgbe_init_rx_addrs_generic(struct ixgbe_hw *hw);
 s32 ixgbe_update_mc_addr_list_generic(struct ixgbe_hw *hw, u8 *mc_addr_list,
                                       u32 mc_addr_count,
                                       ixgbe_mc_addr_itr func);
-s32 ixgbe_update_uc_addr_list_generic(struct ixgbe_hw *hw, u8 *addr_list,
-                                      u32 addr_count, ixgbe_mc_addr_itr func);
+s32 ixgbe_update_uc_addr_list_generic(struct ixgbe_hw *hw,
+                                      struct list_head *uc_list);
 s32 ixgbe_enable_mc_generic(struct ixgbe_hw *hw);
 s32 ixgbe_disable_mc_generic(struct ixgbe_hw *hw);
 s32 ixgbe_enable_rx_dma_generic(struct ixgbe_hw *hw, u32 regval);
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 924aa5ed02ce..de70a2df9aeb 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -2181,11 +2181,7 @@ static void ixgbe_set_rx_mode(struct net_device *netdev)
         IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
 
         /* reprogram secondary unicast list */
-        addr_count = netdev->uc_count;
-        if (addr_count)
-                addr_list = netdev->uc_list->dmi_addr;
-        hw->mac.ops.update_uc_addr_list(hw, addr_list, addr_count,
-                                          ixgbe_addr_list_itr);
+        hw->mac.ops.update_uc_addr_list(hw, &netdev->uc_list);
 
         /* reprogram multicast list */
         addr_count = netdev->mc_count;
diff --git a/drivers/net/ixgbe/ixgbe_type.h b/drivers/net/ixgbe/ixgbe_type.h
index df1f7034c284..a8a8243d8fdb 100644
--- a/drivers/net/ixgbe/ixgbe_type.h
+++ b/drivers/net/ixgbe/ixgbe_type.h
@@ -30,6 +30,7 @@
 
 #include <linux/types.h>
 #include <linux/mdio.h>
+#include <linux/list.h>
 
 /* Vendor ID */
 #define IXGBE_INTEL_VENDOR_ID   0x8086
@@ -2223,8 +2224,7 @@ struct ixgbe_mac_operations {
         s32 (*set_vmdq)(struct ixgbe_hw *, u32, u32);
         s32 (*clear_vmdq)(struct ixgbe_hw *, u32, u32);
         s32 (*init_rx_addrs)(struct ixgbe_hw *);
-        s32 (*update_uc_addr_list)(struct ixgbe_hw *, u8 *, u32,
-                                   ixgbe_mc_addr_itr);
+        s32 (*update_uc_addr_list)(struct ixgbe_hw *, struct list_head *);
         s32 (*update_mc_addr_list)(struct ixgbe_hw *, u8 *, u32,
                                    ixgbe_mc_addr_itr);
         s32 (*enable_mc)(struct ixgbe_hw *);
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index d5334b41e4b4..021d9941c292 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -232,7 +232,7 @@ static int macvlan_open(struct net_device *dev)
         if (macvlan_addr_busy(vlan->port, dev->dev_addr))
                 goto out;
 
-        err = dev_unicast_add(lowerdev, dev->dev_addr, ETH_ALEN);
+        err = dev_unicast_add(lowerdev, dev->dev_addr);
         if (err < 0)
                 goto out;
         if (dev->flags & IFF_ALLMULTI) {
@@ -244,7 +244,7 @@ static int macvlan_open(struct net_device *dev)
         return 0;
 
 del_unicast:
-        dev_unicast_delete(lowerdev, dev->dev_addr, ETH_ALEN);
+        dev_unicast_delete(lowerdev, dev->dev_addr);
 out:
         return err;
 }
@@ -258,7 +258,7 @@ static int macvlan_stop(struct net_device *dev)
         if (dev->flags & IFF_ALLMULTI)
                 dev_set_allmulti(lowerdev, -1);
 
-        dev_unicast_delete(lowerdev, dev->dev_addr, ETH_ALEN);
+        dev_unicast_delete(lowerdev, dev->dev_addr);
 
         macvlan_hash_del(vlan);
         return 0;
@@ -282,10 +282,11 @@ static int macvlan_set_mac_address(struct net_device *dev, void *p)
                 if (macvlan_addr_busy(vlan->port, addr->sa_data))
                         return -EBUSY;
 
-                if ((err = dev_unicast_add(lowerdev, addr->sa_data, ETH_ALEN)))
+                err = dev_unicast_add(lowerdev, addr->sa_data);
+                if (err)
                         return err;
 
-                dev_unicast_delete(lowerdev, dev->dev_addr, ETH_ALEN);
+                dev_unicast_delete(lowerdev, dev->dev_addr);
 
                 macvlan_hash_change_addr(vlan, addr->sa_data);
         }
diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index 1361ddc8d31f..b4e18a58cb1b 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -55,6 +55,7 @@
 #include <linux/types.h>
 #include <linux/inet_lro.h>
 #include <asm/system.h>
+#include <linux/list.h>
 
 static char mv643xx_eth_driver_name[] = "mv643xx_eth";
 static char mv643xx_eth_driver_version[] = "1.4";
@@ -1721,20 +1722,20 @@ static void uc_addr_set(struct mv643xx_eth_private *mp, unsigned char *addr)
 
 static u32 uc_addr_filter_mask(struct net_device *dev)
 {
-        struct dev_addr_list *uc_ptr;
+        struct netdev_hw_addr *ha;
         u32 nibbles;
 
         if (dev->flags & IFF_PROMISC)
                 return 0;
 
         nibbles = 1 << (dev->dev_addr[5] & 0x0f);
-        for (uc_ptr = dev->uc_list; uc_ptr != NULL; uc_ptr = uc_ptr->next) {
-                if (memcmp(dev->dev_addr, uc_ptr->da_addr, 5))
+        list_for_each_entry(ha, &dev->uc_list, list) {
+                if (memcmp(dev->dev_addr, ha->addr, 5))
                         return 0;
-                if ((dev->dev_addr[5] ^ uc_ptr->da_addr[5]) & 0xf0)
+                if ((dev->dev_addr[5] ^ ha->addr[5]) & 0xf0)
                         return 0;
 
-                nibbles |= 1 << (uc_ptr->da_addr[5] & 0x0f);
+                nibbles |= 1 << (ha->addr[5] & 0x0f);
         }
 
         return nibbles;
diff --git a/drivers/net/niu.c b/drivers/net/niu.c
index edac3a0b02d6..fa61a12c5e15 100644
--- a/drivers/net/niu.c
+++ b/drivers/net/niu.c
@@ -22,6 +22,7 @@
 #include <linux/log2.h>
 #include <linux/jiffies.h>
 #include <linux/crc32.h>
+#include <linux/list.h>
 
 #include <linux/io.h>
 
@@ -6362,6 +6363,7 @@ static void niu_set_rx_mode(struct net_device *dev)
         struct niu *np = netdev_priv(dev);
         int i, alt_cnt, err;
         struct dev_addr_list *addr;
+        struct netdev_hw_addr *ha;
         unsigned long flags;
         u16 hash[16] = { 0, };
 
@@ -6383,9 +6385,8 @@ static void niu_set_rx_mode(struct net_device *dev)
         if (alt_cnt) {
                 int index = 0;
 
-                for (addr = dev->uc_list; addr; addr = addr->next) {
-                        err = niu_set_alt_mac(np, index,
-                                              addr->da_addr);
+                list_for_each_entry(ha, &dev->uc_list, list) {
+                        err = niu_set_alt_mac(np, index, ha->addr);
                         if (err)
                                 printk(KERN_WARNING PFX "%s: Error %d "
                                        "adding alt mac %d\n",
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 6cc5bcd34fb0..0c9ca67f66e6 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -680,6 +680,7 @@ static void virtnet_set_rx_mode(struct net_device *dev)
         u8 promisc, allmulti;
         struct virtio_net_ctrl_mac *mac_data;
         struct dev_addr_list *addr;
+        struct netdev_hw_addr *ha;
         void *buf;
         int i;
 
@@ -718,9 +719,9 @@ static void virtnet_set_rx_mode(struct net_device *dev)
 
         /* Store the unicast list and count in the front of the buffer */
         mac_data->entries = dev->uc_count;
-        addr = dev->uc_list;
-        for (i = 0; i < dev->uc_count; i++, addr = addr->next)
-                memcpy(&mac_data->macs[i][0], addr->da_addr, ETH_ALEN);
+        i = 0;
+        list_for_each_entry(ha, &dev->uc_list, list)
+                memcpy(&mac_data->macs[i++][0], ha->addr, ETH_ALEN);
 
         sg_set_buf(&sg[0], mac_data,
                    sizeof(mac_data->entries) + (dev->uc_count * ETH_ALEN));
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 9ca6bab7c9ba..ecd3d06c0d5c 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -19,6 +19,7 @@
 #include <linux/etherdevice.h>
 #include <linux/mii.h>
 #include <linux/ip.h>
+#include <linux/list.h>
 
 #include "qeth_core.h"
 
@@ -640,6 +641,7 @@ static void qeth_l2_set_multicast_list(struct net_device *dev)
 {
         struct qeth_card *card = dev->ml_priv;
         struct dev_addr_list *dm;
+        struct netdev_hw_addr *ha;
 
         if (card->info.type == QETH_CARD_TYPE_OSN)
                 return ;
@@ -653,8 +655,8 @@ static void qeth_l2_set_multicast_list(struct net_device *dev)
         for (dm = dev->mc_list; dm; dm = dm->next)
                 qeth_l2_add_mc(card, dm->da_addr, 0);
 
-        for (dm = dev->uc_list; dm; dm = dm->next)
-                qeth_l2_add_mc(card, dm->da_addr, 1);
+        list_for_each_entry(ha, &dev->uc_list, list)
+                qeth_l2_add_mc(card, ha->addr, 1);
 
         spin_unlock_bh(&card->mclock);
         if (!qeth_adp_supported(card, IPA_SETADP_SET_PROMISC_MODE))
diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index ce33f107b0a0..f791348871fc 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -182,8 +182,8 @@ static void fcoe_update_src_mac(struct fcoe_ctlr *fip, u8 *old, u8 *new)
         fc = fcoe_from_ctlr(fip);
         rtnl_lock();
         if (!is_zero_ether_addr(old))
-                dev_unicast_delete(fc->real_dev, old, ETH_ALEN);
-        dev_unicast_add(fc->real_dev, new, ETH_ALEN);
+                dev_unicast_delete(fc->real_dev, old);
+        dev_unicast_add(fc->real_dev, new);
         rtnl_unlock();
 }
 
@@ -233,13 +233,11 @@ void fcoe_netdev_cleanup(struct fcoe_softc *fc)
         /* Delete secondary MAC addresses */
         rtnl_lock();
         memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
-        dev_unicast_delete(fc->real_dev, flogi_maddr, ETH_ALEN);
+        dev_unicast_delete(fc->real_dev, flogi_maddr);
         if (!is_zero_ether_addr(fc->ctlr.data_src_addr))
-                dev_unicast_delete(fc->real_dev,
-                                   fc->ctlr.data_src_addr, ETH_ALEN);
+                dev_unicast_delete(fc->real_dev, fc->ctlr.data_src_addr);
         if (fc->ctlr.spma)
-                dev_unicast_delete(fc->real_dev,
-                                   fc->ctlr.ctl_src_addr, ETH_ALEN);
+                dev_unicast_delete(fc->real_dev, fc->ctlr.ctl_src_addr);
         dev_mc_delete(fc->real_dev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
         rtnl_unlock();
 }
@@ -347,9 +345,9 @@ static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev)
          */
         rtnl_lock();
         memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
-        dev_unicast_add(fc->real_dev, flogi_maddr, ETH_ALEN);
+        dev_unicast_add(fc->real_dev, flogi_maddr);
         if (fc->ctlr.spma)
-                dev_unicast_add(fc->real_dev, fc->ctlr.ctl_src_addr, ETH_ALEN);
+                dev_unicast_add(fc->real_dev, fc->ctlr.ctl_src_addr);
         dev_mc_add(fc->real_dev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
         rtnl_unlock();
 
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 1eaf5ae14fea..bbfabf3012b6 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -215,9 +215,12 @@ struct netdev_hw_addr {
         struct list_head        list;
         unsigned char           addr[MAX_ADDR_LEN];
         unsigned char           type;
-#define NETDEV_HW_ADDR_T_LAN    1
-#define NETDEV_HW_ADDR_T_SAN    2
-#define NETDEV_HW_ADDR_T_SLAVE  3
+#define NETDEV_HW_ADDR_T_LAN            1
+#define NETDEV_HW_ADDR_T_SAN            2
+#define NETDEV_HW_ADDR_T_SLAVE          3
+#define NETDEV_HW_ADDR_T_UNICAST        4
+        int                     refcount;
+        bool                    synced;
         struct rcu_head         rcu_head;
 };
 
@@ -773,10 +776,11 @@ struct net_device
         unsigned char           addr_len;       /* hardware address length      */
         unsigned short          dev_id;         /* for shared network cards */
 
-        spinlock_t              addr_list_lock;
-        struct dev_addr_list    *uc_list;       /* Secondary unicast mac addresses */
+        struct list_head        uc_list;        /* Secondary unicast mac
+                                                   addresses */
         int                     uc_count;       /* Number of installed ucasts   */
         int                     uc_promisc;
+        spinlock_t              addr_list_lock;
         struct dev_addr_list    *mc_list;       /* Multicast mac addresses      */
         int                     mc_count;       /* Number of installed mcasts   */
         unsigned int            promiscuity;
@@ -1836,8 +1840,8 @@ extern int dev_addr_del_multiple(struct net_device *to_dev,
 /* Functions used for secondary unicast and multicast support */
 extern void             dev_set_rx_mode(struct net_device *dev);
 extern void             __dev_set_rx_mode(struct net_device *dev);
-extern int              dev_unicast_delete(struct net_device *dev, void *addr, int alen);
-extern int              dev_unicast_add(struct net_device *dev, void *addr, int alen);
+extern int              dev_unicast_delete(struct net_device *dev, void *addr);
+extern int              dev_unicast_add(struct net_device *dev, void *addr);
 extern int              dev_unicast_sync(struct net_device *to, struct net_device *from);
 extern void             dev_unicast_unsync(struct net_device *to, struct net_device *from);
 extern int              dev_mc_delete(struct net_device *dev, void *addr, int alen, int all);
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index d1e10546eb85..714e1c3536be 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -378,13 +378,13 @@ static void vlan_sync_address(struct net_device *dev,
          * the new address */
         if (compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
             !compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
-                dev_unicast_delete(dev, vlandev->dev_addr, ETH_ALEN);
+                dev_unicast_delete(dev, vlandev->dev_addr);
 
         /* vlan address was equal to the old address and is different from
          * the new address */
         if (!compare_ether_addr(vlandev->dev_addr, vlan->real_dev_addr) &&
             compare_ether_addr(vlandev->dev_addr, dev->dev_addr))
-                dev_unicast_add(dev, vlandev->dev_addr, ETH_ALEN);
+                dev_unicast_add(dev, vlandev->dev_addr);
 
         memcpy(vlan->real_dev_addr, dev->dev_addr, ETH_ALEN);
 }
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 1e2ad4c7c59b..96bad8f233e2 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -441,7 +441,7 @@ static int vlan_dev_open(struct net_device *dev)
                 return -ENETDOWN;
 
         if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr)) {
-                err = dev_unicast_add(real_dev, dev->dev_addr, ETH_ALEN);
+                err = dev_unicast_add(real_dev, dev->dev_addr);
                 if (err < 0)
                         goto out;
         }
@@ -470,7 +470,7 @@ clear_allmulti:
                 dev_set_allmulti(real_dev, -1);
 del_unicast:
         if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
-                dev_unicast_delete(real_dev, dev->dev_addr, ETH_ALEN);
+                dev_unicast_delete(real_dev, dev->dev_addr);
 out:
         netif_carrier_off(dev);
         return err;
@@ -492,7 +492,7 @@ static int vlan_dev_stop(struct net_device *dev)
                 dev_set_promiscuity(real_dev, -1);
 
         if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
-                dev_unicast_delete(real_dev, dev->dev_addr, dev->addr_len);
+                dev_unicast_delete(real_dev, dev->dev_addr);
 
         netif_carrier_off(dev);
         return 0;
@@ -511,13 +511,13 @@ static int vlan_dev_set_mac_address(struct net_device *dev, void *p)
                 goto out;
 
         if (compare_ether_addr(addr->sa_data, real_dev->dev_addr)) {
-                err = dev_unicast_add(real_dev, addr->sa_data, ETH_ALEN);
+                err = dev_unicast_add(real_dev, addr->sa_data);
                 if (err < 0)
                         return err;
         }
 
         if (compare_ether_addr(dev->dev_addr, real_dev->dev_addr))
-                dev_unicast_delete(real_dev, dev->dev_addr, ETH_ALEN);
+                dev_unicast_delete(real_dev, dev->dev_addr);
 
 out:
         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
diff --git a/net/core/dev.c b/net/core/dev.c
index 32ceee17896e..e2fcc5f10177 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3473,8 +3473,9 @@ void dev_set_rx_mode(struct net_device *dev)
 
 /* hw addresses list handling functions */
 
-static int __hw_addr_add(struct list_head *list, unsigned char *addr,
-                         int addr_len, unsigned char addr_type)
+static int __hw_addr_add(struct list_head *list, int *delta,
+                         unsigned char *addr, int addr_len,
+                         unsigned char addr_type)
 {
         struct netdev_hw_addr *ha;
         int alloc_size;
@@ -3482,6 +3483,15 @@ static int __hw_addr_add(struct list_head *list, unsigned char *addr,
         if (addr_len > MAX_ADDR_LEN)
                 return -EINVAL;
 
+        list_for_each_entry(ha, list, list) {
+                if (!memcmp(ha->addr, addr, addr_len) &&
+                    ha->type == addr_type) {
+                        ha->refcount++;
+                        return 0;
+                }
+        }
+
+
         alloc_size = sizeof(*ha);
         if (alloc_size < L1_CACHE_BYTES)
                 alloc_size = L1_CACHE_BYTES;
@@ -3490,7 +3500,11 @@ static int __hw_addr_add(struct list_head *list, unsigned char *addr,
                 return -ENOMEM;
         memcpy(ha->addr, addr, addr_len);
         ha->type = addr_type;
+        ha->refcount = 1;
+        ha->synced = false;
         list_add_tail_rcu(&ha->list, list);
+        if (delta)
+                (*delta)++;
         return 0;
 }
 
@@ -3502,29 +3516,30 @@ static void ha_rcu_free(struct rcu_head *head)
         kfree(ha);
 }
 
-static int __hw_addr_del_ii(struct list_head *list, unsigned char *addr,
-                            int addr_len, unsigned char addr_type,
-                            int ignore_index)
+static int __hw_addr_del(struct list_head *list, int *delta,
+                         unsigned char *addr, int addr_len,
+                         unsigned char addr_type)
 {
         struct netdev_hw_addr *ha;
-        int i = 0;
 
         list_for_each_entry(ha, list, list) {
-                if (i++ != ignore_index &&
-                    !memcmp(ha->addr, addr, addr_len) &&
+                if (!memcmp(ha->addr, addr, addr_len) &&
                     (ha->type == addr_type || !addr_type)) {
+                        if (--ha->refcount)
+                                return 0;
                         list_del_rcu(&ha->list);
                         call_rcu(&ha->rcu_head, ha_rcu_free);
+                        if (delta)
+                                (*delta)--;
                         return 0;
                 }
         }
         return -ENOENT;
 }
 
-static int __hw_addr_add_multiple_ii(struct list_head *to_list,
-                                     struct list_head *from_list,
-                                     int addr_len, unsigned char addr_type,
-                                     int ignore_index)
+static int __hw_addr_add_multiple(struct list_head *to_list, int *to_delta,
+                                  struct list_head *from_list, int addr_len,
+                                  unsigned char addr_type)
 {
         int err;
         struct netdev_hw_addr *ha, *ha2;
@@ -3532,7 +3547,8 @@ static int __hw_addr_add_multiple_ii(struct list_head *to_list,
 
         list_for_each_entry(ha, from_list, list) {
                 type = addr_type ? addr_type : ha->type;
-                err = __hw_addr_add(to_list, ha->addr, addr_len, type);
+                err = __hw_addr_add(to_list, to_delta, ha->addr,
+                                    addr_len, type);
                 if (err)
                         goto unroll;
         }
@@ -3543,27 +3559,69 @@ unroll:
                 if (ha2 == ha)
                         break;
                 type = addr_type ? addr_type : ha2->type;
-                __hw_addr_del_ii(to_list, ha2->addr, addr_len, type,
-                                 ignore_index);
+                __hw_addr_del(to_list, to_delta, ha2->addr,
+                              addr_len, type);
         }
         return err;
 }
 
-static void __hw_addr_del_multiple_ii(struct list_head *to_list,
-                                      struct list_head *from_list,
-                                      int addr_len, unsigned char addr_type,
-                                      int ignore_index)
+static void __hw_addr_del_multiple(struct list_head *to_list, int *to_delta,
+                                   struct list_head *from_list, int addr_len,
+                                   unsigned char addr_type)
 {
         struct netdev_hw_addr *ha;
         unsigned char type;
 
         list_for_each_entry(ha, from_list, list) {
                 type = addr_type ? addr_type : ha->type;
-                __hw_addr_del_ii(to_list, ha->addr, addr_len, addr_type,
-                                 ignore_index);
+                __hw_addr_del(to_list, to_delta, ha->addr,
+                              addr_len, addr_type);
+        }
+}
+
+static int __hw_addr_sync(struct list_head *to_list, int *to_delta,
+                          struct list_head *from_list, int *from_delta,
+                          int addr_len)
+{
+        int err = 0;
+        struct netdev_hw_addr *ha, *tmp;
+
+        list_for_each_entry_safe(ha, tmp, from_list, list) {
+                if (!ha->synced) {
+                        err = __hw_addr_add(to_list, to_delta, ha->addr,
+                                            addr_len, ha->type);
+                        if (err)
+                                break;
+                        ha->synced = true;
+                        ha->refcount++;
+                } else if (ha->refcount == 1) {
+                        __hw_addr_del(to_list, to_delta, ha->addr,
+                                      addr_len, ha->type);
+                        __hw_addr_del(from_list, from_delta, ha->addr,
+                                      addr_len, ha->type);
+                }
         }
+        return err;
 }
 
+static void __hw_addr_unsync(struct list_head *to_list, int *to_delta,
+                             struct list_head *from_list, int *from_delta,
+                             int addr_len)
+{
+        struct netdev_hw_addr *ha, *tmp;
+
+        list_for_each_entry_safe(ha, tmp, from_list, list) {
+                if (ha->synced) {
+                        __hw_addr_del(to_list, to_delta, ha->addr,
+                                      addr_len, ha->type);
+                        ha->synced = false;
+                        __hw_addr_del(from_list, from_delta, ha->addr,
+                                      addr_len, ha->type);
+                }
+        }
+}
+
+
 static void __hw_addr_flush(struct list_head *list)
 {
         struct netdev_hw_addr *ha, *tmp;
@@ -3594,7 +3652,7 @@ static int dev_addr_init(struct net_device *dev)
 
         INIT_LIST_HEAD(&dev->dev_addr_list);
         memset(addr, 0, sizeof(*addr));
-        err = __hw_addr_add(&dev->dev_addr_list, addr, sizeof(*addr),
+        err = __hw_addr_add(&dev->dev_addr_list, NULL, addr, sizeof(*addr),
                             NETDEV_HW_ADDR_T_LAN);
         if (!err) {
                 /*
@@ -3626,7 +3684,7 @@ int dev_addr_add(struct net_device *dev, unsigned char *addr,
 
         ASSERT_RTNL();
 
-        err = __hw_addr_add(&dev->dev_addr_list, addr, dev->addr_len,
+        err = __hw_addr_add(&dev->dev_addr_list, NULL, addr, dev->addr_len,
                             addr_type);
         if (!err)
                 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
@@ -3649,11 +3707,20 @@ int dev_addr_del(struct net_device *dev, unsigned char *addr,
                  unsigned char addr_type)
 {
         int err;
+        struct netdev_hw_addr *ha;
 
         ASSERT_RTNL();
 
-        err = __hw_addr_del_ii(&dev->dev_addr_list, addr, dev->addr_len,
-                               addr_type, 0);
+        /*
+         * We can not remove the first address from the list because
+         * dev->dev_addr points to that.
+         */
+        ha = list_first_entry(&dev->dev_addr_list, struct netdev_hw_addr, list);
+        if (ha->addr == dev->dev_addr && ha->refcount == 1)
+                return -ENOENT;
+
+        err = __hw_addr_del(&dev->dev_addr_list, NULL, addr, dev->addr_len,
+                            addr_type);
         if (!err)
                 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev);
         return err;
@@ -3680,9 +3747,9 @@ int dev_addr_add_multiple(struct net_device *to_dev,
 
         if (from_dev->addr_len != to_dev->addr_len)
                 return -EINVAL;
-        err = __hw_addr_add_multiple_ii(&to_dev->dev_addr_list,
-                                        &from_dev->dev_addr_list,
-                                        to_dev->addr_len, addr_type, 0);
+        err = __hw_addr_add_multiple(&to_dev->dev_addr_list, NULL,
+                                     &from_dev->dev_addr_list,
+                                     to_dev->addr_len, addr_type);
         if (!err)
                 call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev);
         return err;
@@ -3707,9 +3774,9 @@ int dev_addr_del_multiple(struct net_device *to_dev,
 
         if (from_dev->addr_len != to_dev->addr_len)
                 return -EINVAL;
-        __hw_addr_del_multiple_ii(&to_dev->dev_addr_list,
-                                  &from_dev->dev_addr_list,
-                                  to_dev->addr_len, addr_type, 0);
+        __hw_addr_del_multiple(&to_dev->dev_addr_list, NULL,
+                               &from_dev->dev_addr_list,
+                               to_dev->addr_len, addr_type);
         call_netdevice_notifiers(NETDEV_CHANGEADDR, to_dev);
         return 0;
 }
@@ -3779,24 +3846,22 @@ int __dev_addr_add(struct dev_addr_list **list, int *count,
  *      dev_unicast_delete      - Release secondary unicast address.
  *      @dev: device
  *      @addr: address to delete
- *      @alen: length of @addr
  *
  *      Release reference to a secondary unicast address and remove it
  *      from the device if the reference count drops to zero.
  *
  *      The caller must hold the rtnl_mutex.
  */
-int dev_unicast_delete(struct net_device *dev, void *addr, int alen)
+int dev_unicast_delete(struct net_device *dev, void *addr)
 {
         int err;
 
         ASSERT_RTNL();
 
-        netif_addr_lock_bh(dev);
-        err = __dev_addr_delete(&dev->uc_list, &dev->uc_count, addr, alen, 0);
+        err = __hw_addr_del(&dev->uc_list, &dev->uc_count, addr,
+                            dev->addr_len, NETDEV_HW_ADDR_T_UNICAST);
         if (!err)
                 __dev_set_rx_mode(dev);
-        netif_addr_unlock_bh(dev);
         return err;
 }
 EXPORT_SYMBOL(dev_unicast_delete);
@@ -3805,24 +3870,22 @@ EXPORT_SYMBOL(dev_unicast_delete);
  *      dev_unicast_add         - add a secondary unicast address
  *      @dev: device
  *      @addr: address to add
- *      @alen: length of @addr
  *
  *      Add a secondary unicast address to the device or increase
  *      the reference count if it already exists.
  *
  *      The caller must hold the rtnl_mutex.
  */
-int dev_unicast_add(struct net_device *dev, void *addr, int alen)
+int dev_unicast_add(struct net_device *dev, void *addr)
 {
         int err;
 
         ASSERT_RTNL();
 
-        netif_addr_lock_bh(dev);
-        err = __dev_addr_add(&dev->uc_list, &dev->uc_count, addr, alen, 0);
+        err = __hw_addr_add(&dev->uc_list, &dev->uc_count, addr,
+                            dev->addr_len, NETDEV_HW_ADDR_T_UNICAST);
         if (!err)
                 __dev_set_rx_mode(dev);
-        netif_addr_unlock_bh(dev);
         return err;
 }
 EXPORT_SYMBOL(dev_unicast_add);
@@ -3879,8 +3942,7 @@ void __dev_addr_unsync(struct dev_addr_list **to, int *to_count,
  *      @from: source device
  *
  *      Add newly added addresses to the destination device and release
- *      addresses that have no users left. The source device must be
- *      locked by netif_tx_lock_bh.
+ *      addresses that have no users left.
  *
  *      This function is intended to be called from the dev->set_rx_mode
  *      function of layered software devices.
@@ -3889,12 +3951,15 @@ int dev_unicast_sync(struct net_device *to, struct net_device *from)
 {
         int err = 0;
 
-        netif_addr_lock_bh(to);
-        err = __dev_addr_sync(&to->uc_list, &to->uc_count,
-                              &from->uc_list, &from->uc_count);
+        ASSERT_RTNL();
+
+        if (to->addr_len != from->addr_len)
+                return -EINVAL;
+
+        err = __hw_addr_sync(&to->uc_list, &to->uc_count,
+                             &from->uc_list, &from->uc_count, to->addr_len);
         if (!err)
                 __dev_set_rx_mode(to);
-        netif_addr_unlock_bh(to);
         return err;
 }
 EXPORT_SYMBOL(dev_unicast_sync);
@@ -3910,18 +3975,33 @@ EXPORT_SYMBOL(dev_unicast_sync);
  */
 void dev_unicast_unsync(struct net_device *to, struct net_device *from)
 {
-        netif_addr_lock_bh(from);
-        netif_addr_lock(to);
+        ASSERT_RTNL();
 
-        __dev_addr_unsync(&to->uc_list, &to->uc_count,
-                          &from->uc_list, &from->uc_count);
-        __dev_set_rx_mode(to);
+        if (to->addr_len != from->addr_len)
+                return;
 
-        netif_addr_unlock(to);
-        netif_addr_unlock_bh(from);
+        __hw_addr_unsync(&to->uc_list, &to->uc_count,
+                         &from->uc_list, &from->uc_count, to->addr_len);
+        __dev_set_rx_mode(to);
 }
 EXPORT_SYMBOL(dev_unicast_unsync);
 
+static void dev_unicast_flush(struct net_device *dev)
+{
+        /* rtnl_mutex must be held here */
+
+        __hw_addr_flush(&dev->uc_list);
+        dev->uc_count = 0;
+}
+
+static void dev_unicast_init(struct net_device *dev)
+{
+        /* rtnl_mutex must be held here */
+
+        INIT_LIST_HEAD(&dev->uc_list);
+}
+
+
 static void __dev_addr_discard(struct dev_addr_list **list)
 {
         struct dev_addr_list *tmp;
@@ -3940,9 +4020,6 @@ static void dev_addr_discard(struct net_device *dev)
 {
         netif_addr_lock_bh(dev);
 
-        __dev_addr_discard(&dev->uc_list);
-        dev->uc_count = 0;
-
         __dev_addr_discard(&dev->mc_list);
         dev->mc_count = 0;
 
@@ -4535,6 +4612,7 @@ static void rollback_registered(struct net_device *dev)
         /*
          *      Flush the unicast and multicast chains
          */
+        dev_unicast_flush(dev);
         dev_addr_discard(dev);
 
         if (dev->netdev_ops->ndo_uninit)
@@ -5020,6 +5098,8 @@ struct net_device *alloc_netdev_mq(int sizeof_priv, const char *name,
         if (dev_addr_init(dev))
                 goto free_tx;
 
+        dev_unicast_init(dev);
+
         dev_net_set(dev, &init_net);
 
         dev->_tx = tx;
@@ -5223,6 +5303,7 @@ int dev_change_net_namespace(struct net_device *dev, struct net *net, const char
         /*
          *      Flush the unicast and multicast chains
          */
+        dev_unicast_flush(dev);
         dev_addr_discard(dev);
 
         netdev_unregister_kobject(dev);
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index ed131181215d..2175e6d5cc8d 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -67,7 +67,7 @@ static int dsa_slave_open(struct net_device *dev)
                 return -ENETDOWN;
 
         if (compare_ether_addr(dev->dev_addr, master->dev_addr)) {
-                err = dev_unicast_add(master, dev->dev_addr, ETH_ALEN);
+                err = dev_unicast_add(master, dev->dev_addr);
                 if (err < 0)
                         goto out;
         }
@@ -90,7 +90,7 @@ clear_allmulti:
                 dev_set_allmulti(master, -1);
 del_unicast:
         if (compare_ether_addr(dev->dev_addr, master->dev_addr))
-                dev_unicast_delete(master, dev->dev_addr, ETH_ALEN);
+                dev_unicast_delete(master, dev->dev_addr);
 out:
         return err;
 }
@@ -108,7 +108,7 @@ static int dsa_slave_close(struct net_device *dev)
                 dev_set_promiscuity(master, -1);
 
         if (compare_ether_addr(dev->dev_addr, master->dev_addr))
-                dev_unicast_delete(master, dev->dev_addr, ETH_ALEN);
+                dev_unicast_delete(master, dev->dev_addr);
 
         return 0;
 }
@@ -147,13 +147,13 @@ static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
                 goto out;
 
         if (compare_ether_addr(addr->sa_data, master->dev_addr)) {
-                err = dev_unicast_add(master, addr->sa_data, ETH_ALEN);
+                err = dev_unicast_add(master, addr->sa_data);
                 if (err < 0)
                         return err;
         }
 
         if (compare_ether_addr(dev->dev_addr, master->dev_addr))
-                dev_unicast_delete(master, dev->dev_addr, ETH_ALEN);
+                dev_unicast_delete(master, dev->dev_addr);
 
 out:
         memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index c7c5d524967e..6da9f38ef5c1 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1582,9 +1582,9 @@ static int packet_dev_mc(struct net_device *dev, struct packet_mclist *i,
                 break;
         case PACKET_MR_UNICAST:
                 if (what > 0)
-                        return dev_unicast_add(dev, i->addr, i->alen);
+                        return dev_unicast_add(dev, i->addr);
                 else
-                        return dev_unicast_delete(dev, i->addr, i->alen);
+                        return dev_unicast_delete(dev, i->addr);
                 break;
         default:;
         }