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datapath.c: Use built-in RCU list checking

Browse source 
hlist_for_each_entry_rcu() has built-in RCU and lock checking.

Pass cond argument to list_for_each_entry_rcu() to silence
false lockdep warning when CONFIG_PROVE_RCU_LIST is enabled
by default.

Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Madhuparna Bhowmik 2020-02-19 01:28:02 +05:30 committed by David S. Miller
parent fed48423f1
commit 53742e69e8
1 changed files with 6 additions and 3 deletions
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9
net/openvswitch/datapath.c
View file

@ -179,7 +179,8 @@ struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no)
struct hlist_head *head;
head = vport_hash_bucket(dp, port_no);
hlist_for_each_entry_rcu(vport, head, dp_hash_node) {
hlist_for_each_entry_rcu(vport, head, dp_hash_node,
lockdep_ovsl_is_held()) {
if (vport->port_no == port_no)
return vport;
}
@ -2042,7 +2043,8 @@ static unsigned int ovs_get_max_headroom(struct datapath *dp)
int i;
for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++) {
hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node) {
hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node,
lockdep_ovsl_is_held()) {
dev = vport->dev;
dev_headroom = netdev_get_fwd_headroom(dev);
if (dev_headroom > max_headroom)
@ -2061,7 +2063,8 @@ static void ovs_update_headroom(struct datapath *dp, unsigned int new_headroom)
dp->max_headroom = new_headroom;
for (i = 0; i < DP_VPORT_HASH_BUCKETS; i++)
hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node)
hlist_for_each_entry_rcu(vport, &dp->ports[i], dp_hash_node,
lockdep_ovsl_is_held())
netdev_set_rx_headroom(vport->dev, new_headroom);
}