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net: introduce netdev_alloc_pcpu_stats() for drivers

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There are many drivers calling alloc_percpu() to allocate pcpu stats
and then initializing ->syncp. So just introduce a helper function for them.

Cc: David S. Miller <[email protected]>
Signed-off-by: Cong Wang <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
WANG Cong 2014-02-13 11:46:28 -08:00 • committed by David S. Miller
commit 1c213bd24a
19 changed files with 35 additions and 154 deletions
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8
net/openvswitch/datapath.c
View file

@ -1215,18 +1215,12 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
if (err)
goto err_free_dp;
dp->stats_percpu = alloc_percpu(struct dp_stats_percpu);
dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu);
if (!dp->stats_percpu) {
err = -ENOMEM;
goto err_destroy_table;
}
for_each_possible_cpu(i) {
struct dp_stats_percpu *dpath_stats;
dpath_stats = per_cpu_ptr(dp->stats_percpu, i);
u64_stats_init(&dpath_stats->sync);
}
dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head),
GFP_KERNEL);
if (!dp->ports) {

10
net/openvswitch/vport.c
View file

@ -121,7 +121,6 @@ struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *ops,
{
struct vport *vport;
size_t alloc_size;
int i;
alloc_size = sizeof(struct vport);
if (priv_size) {
@ -139,19 +138,12 @@ struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *ops,
vport->ops = ops;
INIT_HLIST_NODE(&vport->dp_hash_node);
vport->percpu_stats = alloc_percpu(struct pcpu_sw_netstats);
vport->percpu_stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
if (!vport->percpu_stats) {
kfree(vport);
return ERR_PTR(-ENOMEM);
}
for_each_possible_cpu(i) {
struct pcpu_sw_netstats *vport_stats;
vport_stats = per_cpu_ptr(vport->percpu_stats, i);
u64_stats_init(&vport_stats->syncp);
}
spin_lock_init(&vport->stats_lock);
return vport;