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| author | Juhee Kang <claudiajkang@gmail.com> | 2022-02-20 15:32:50 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-02-21 20:43:10 -0800 |
| commit | a0b92e0514bb3c5e57c33fd720724a629f67e042 (patch) | |
| tree | fae08e62f84df38c62de933e627229b72e3fa056 /net/hsr | |
| parent | 7b779cc8846ae0bfdad8eca7b751109a5cf930b7 (diff) | |
| download | linux-a0b92e0514bb3c5e57c33fd720724a629f67e042.tar.bz2 | |
net: hsr: fix hsr build error when lockdep is not enabled
In hsr, lockdep_is_held() is needed for rcu_dereference_bh_check().
But if lockdep is not enabled, lockdep_is_held() causes a build error:
ERROR: modpost: "lockdep_is_held" [net/hsr/hsr.ko] undefined!
Thus, this patch solved by adding lockdep_hsr_is_held(). This helper
function calls the lockdep_is_held() when lockdep is enabled, and returns 1
if not defined.
Fixes: e7f27420681f ("net: hsr: fix suspicious RCU usage warning in hsr_node_get_first()")
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Juhee Kang <claudiajkang@gmail.com>
Link: https://lore.kernel.org/r/20220220153250.5285-1-claudiajkang@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/hsr')
| -rw-r--r-- | net/hsr/hsr_framereg.c | 25 | ||||
| -rw-r--r-- | net/hsr/hsr_framereg.h | 8 |
2 files changed, 22 insertions, 11 deletions
diff --git a/net/hsr/hsr_framereg.c b/net/hsr/hsr_framereg.c index 62272d76545c..584e21788799 100644 --- a/net/hsr/hsr_framereg.c +++ b/net/hsr/hsr_framereg.c @@ -20,6 +20,13 @@ #include "hsr_framereg.h" #include "hsr_netlink.h" +#ifdef CONFIG_LOCKDEP +int lockdep_hsr_is_held(spinlock_t *lock) +{ + return lockdep_is_held(lock); +} +#endif + u32 hsr_mac_hash(struct hsr_priv *hsr, const unsigned char *addr) { u32 hash = jhash(addr, ETH_ALEN, hsr->hash_seed); @@ -27,11 +34,12 @@ u32 hsr_mac_hash(struct hsr_priv *hsr, const unsigned char *addr) return reciprocal_scale(hash, hsr->hash_buckets); } -struct hsr_node *hsr_node_get_first(struct hlist_head *head, int cond) +struct hsr_node *hsr_node_get_first(struct hlist_head *head, spinlock_t *lock) { struct hlist_node *first; - first = rcu_dereference_bh_check(hlist_first_rcu(head), cond); + first = rcu_dereference_bh_check(hlist_first_rcu(head), + lockdep_hsr_is_held(lock)); if (first) return hlist_entry(first, struct hsr_node, mac_list); @@ -59,8 +67,7 @@ bool hsr_addr_is_self(struct hsr_priv *hsr, unsigned char *addr) { struct hsr_node *node; - node = hsr_node_get_first(&hsr->self_node_db, - lockdep_is_held(&hsr->list_lock)); + node = hsr_node_get_first(&hsr->self_node_db, &hsr->list_lock); if (!node) { WARN_ONCE(1, "HSR: No self node\n"); return false; @@ -107,8 +114,7 @@ int hsr_create_self_node(struct hsr_priv *hsr, ether_addr_copy(node->macaddress_B, addr_b); spin_lock_bh(&hsr->list_lock); - oldnode = hsr_node_get_first(self_node_db, - lockdep_is_held(&hsr->list_lock)); + oldnode = hsr_node_get_first(self_node_db, &hsr->list_lock); if (oldnode) { hlist_replace_rcu(&oldnode->mac_list, &node->mac_list); spin_unlock_bh(&hsr->list_lock); @@ -127,8 +133,7 @@ void hsr_del_self_node(struct hsr_priv *hsr) struct hsr_node *node; spin_lock_bh(&hsr->list_lock); - node = hsr_node_get_first(self_node_db, - lockdep_is_held(&hsr->list_lock)); + node = hsr_node_get_first(self_node_db, &hsr->list_lock); if (node) { hlist_del_rcu(&node->mac_list); kfree_rcu(node, rcu_head); @@ -194,7 +199,7 @@ static struct hsr_node *hsr_add_node(struct hsr_priv *hsr, spin_lock_bh(&hsr->list_lock); hlist_for_each_entry_rcu(node, node_db, mac_list, - lockdep_is_held(&hsr->list_lock)) { + lockdep_hsr_is_held(&hsr->list_lock)) { if (ether_addr_equal(node->macaddress_A, addr)) goto out; if (ether_addr_equal(node->macaddress_B, addr)) @@ -601,7 +606,7 @@ void *hsr_get_next_node(struct hsr_priv *hsr, void *_pos, if (!_pos) { node = hsr_node_get_first(&hsr->node_db[hash], - lockdep_is_held(&hsr->list_lock)); + &hsr->list_lock); if (node) ether_addr_copy(addr, node->macaddress_A); return node; diff --git a/net/hsr/hsr_framereg.h b/net/hsr/hsr_framereg.h index 2efd03fb3465..f3762e9e42b5 100644 --- a/net/hsr/hsr_framereg.h +++ b/net/hsr/hsr_framereg.h @@ -28,8 +28,14 @@ struct hsr_frame_info { bool is_from_san; }; +#ifdef CONFIG_LOCKDEP +int lockdep_hsr_is_held(spinlock_t *lock); +#else +#define lockdep_hsr_is_held(lock) 1 +#endif + u32 hsr_mac_hash(struct hsr_priv *hsr, const unsigned char *addr); -struct hsr_node *hsr_node_get_first(struct hlist_head *head, int cond); +struct hsr_node *hsr_node_get_first(struct hlist_head *head, spinlock_t *lock); void hsr_del_self_node(struct hsr_priv *hsr); void hsr_del_nodes(struct hlist_head *node_db); struct hsr_node *hsr_get_node(struct hsr_port *port, struct hlist_head *node_db, |