diff options
Diffstat (limited to 'lib/rhashtable.c')
| -rw-r--r-- | lib/rhashtable.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/lib/rhashtable.c b/lib/rhashtable.c index 811d51b7cb86..6c4f5c8e9baa 100644 --- a/lib/rhashtable.c +++ b/lib/rhashtable.c @@ -131,9 +131,11 @@ static union nested_table *nested_table_alloc(struct rhashtable *ht, INIT_RHT_NULLS_HEAD(ntbl[i].bucket); } - rcu_assign_pointer(*prev, ntbl); - - return ntbl; + if (cmpxchg(prev, NULL, ntbl) == NULL) + return ntbl; + /* Raced with another thread. */ + kfree(ntbl); + return rcu_dereference(*prev); } static struct bucket_table *nested_bucket_table_alloc(struct rhashtable *ht, |