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-rw-r--r--net/core/neighbour.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 60a9029..799f06e 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -316,7 +316,7 @@ static struct neigh_hash_table *neigh_hash_alloc(unsigned int entries)
{
size_t size = entries * sizeof(struct neighbour *);
struct neigh_hash_table *ret;
- struct neighbour **buckets;
+ struct neighbour __rcu **buckets;
ret = kmalloc(sizeof(*ret), GFP_ATOMIC);
if (!ret)
@@ -324,14 +324,14 @@ static struct neigh_hash_table *neigh_hash_alloc(unsigned int entries)
if (size <= PAGE_SIZE)
buckets = kzalloc(size, GFP_ATOMIC);
else
- buckets = (struct neighbour **)
+ buckets = (struct neighbour __rcu **)
__get_free_pages(GFP_ATOMIC | __GFP_ZERO,
get_order(size));
if (!buckets) {
kfree(ret);
return NULL;
}
- rcu_assign_pointer(ret->hash_buckets, buckets);
+ ret->hash_buckets = buckets;
ret->hash_mask = entries - 1;
get_random_bytes(&ret->hash_rnd, sizeof(ret->hash_rnd));
return ret;
@@ -343,7 +343,7 @@ static void neigh_hash_free_rcu(struct rcu_head *head)
struct neigh_hash_table,
rcu);
size_t size = (nht->hash_mask + 1) * sizeof(struct neighbour *);
- struct neighbour **buckets = nht->hash_buckets;
+ struct neighbour __rcu **buckets = nht->hash_buckets;
if (size <= PAGE_SIZE)
kfree(buckets);
@@ -1540,7 +1540,7 @@ void neigh_table_init_no_netlink(struct neigh_table *tbl)
panic("cannot create neighbour proc dir entry");
#endif
- tbl->nht = neigh_hash_alloc(8);
+ RCU_INIT_POINTER(tbl->nht, neigh_hash_alloc(8));
phsize = (PNEIGH_HASHMASK + 1) * sizeof(struct pneigh_entry *);
tbl->phash_buckets = kzalloc(phsize, GFP_KERNEL);
@@ -1602,7 +1602,8 @@ int neigh_table_clear(struct neigh_table *tbl)
}
write_unlock(&neigh_tbl_lock);
- call_rcu(&tbl->nht->rcu, neigh_hash_free_rcu);
+ call_rcu(&rcu_dereference_protected(tbl->nht, 1)->rcu,
+ neigh_hash_free_rcu);
tbl->nht = NULL;
kfree(tbl->phash_buckets);
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