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[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>
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1 changed files with 4 additions and 2 deletions
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@ -81,14 +81,16 @@ struct vlan_group {
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struct rcu_head rcu;
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};
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static inline struct net_device *vlan_group_get_device(struct vlan_group *vg, int vlan_id)
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static inline struct net_device *vlan_group_get_device(struct vlan_group *vg,
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unsigned int vlan_id)
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{
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struct net_device **array;
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array = vg->vlan_devices_arrays[vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
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return array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN];
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}
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static inline void vlan_group_set_device(struct vlan_group *vg, int vlan_id,
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static inline void vlan_group_set_device(struct vlan_group *vg,
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unsigned int vlan_id,
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struct net_device *dev)
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{
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struct net_device **array;
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