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net: hsr: Pass lockdep expression to RCU lists

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node_db is traversed using list_for_each_entry_rcu
outside an RCU read-side critical section but under the protection
of hsr->list_lock.

Hence, add corresponding lockdep expression to silence false-positive
warnings, and harden RCU lists.

Signed-off-by: Amol Grover <frextrite@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Amol Grover 2020-02-19 15:30:11 +05:30 committed by David S. Miller
parent 7822dee5d1
commit a7a9456e8d
1 changed files with 2 additions and 1 deletions
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net/hsr/hsr_framereg.c
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@ -155,7 +155,8 @@ static struct hsr_node *hsr_add_node(struct hsr_priv *hsr,
new_node->seq_out[i] = seq_out;
spin_lock_bh(&hsr->list_lock);
list_for_each_entry_rcu(node, node_db, mac_list) {
list_for_each_entry_rcu(node, node_db, mac_list,
lockdep_is_held(&hsr->list_lock)) {
if (ether_addr_equal(node->macaddress_A, addr))
goto out;
if (ether_addr_equal(node->macaddress_B, addr))