[VLAN]: Avoid expensive divides

We can avoid divides (as seen with CONFIG_CC_OPTIMIZE_FOR_SIZE=y on
x86) changing vlan_group_get_device()/vlan_group_set_device() id
parameter from signed to unsigned.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 2 deletions

diff --git a/include/linux/if_vlan.h b/include/linux/if_vlan.h
index 976d4b1067d1..4562105fdb2b 100644
--- a/include/linux/if_vlan.h
+++ b/include/linux/if_vlan.h
@@ -81,14 +81,16 @@ struct vlan_group {
         struct rcu_head         rcu;
 };
 
-static inline struct net_device *vlan_group_get_device(struct vlan_group *vg, int vlan_id)
+static inline struct net_device *vlan_group_get_device(struct vlan_group *vg,
+                                                       unsigned int vlan_id)
 {
         struct net_device **array;
         array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
         return array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN];
 }
 
-static inline void vlan_group_set_device(struct vlan_group *vg, int vlan_id,
+static inline void vlan_group_set_device(struct vlan_group *vg,
+                                         unsigned int vlan_id,
                                          struct net_device *dev)
 {
         struct net_device **array;