diff options
Diffstat (limited to 'lib/rhashtable.c')
| -rw-r--r-- | lib/rhashtable.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/rhashtable.c b/lib/rhashtable.c index 6ffc793145f3..68210cc2bab8 100644 --- a/lib/rhashtable.c +++ b/lib/rhashtable.c @@ -271,6 +271,9 @@ static void rhashtable_rehash(struct rhashtable *ht, */ rcu_assign_pointer(ht->future_tbl, new_tbl); + /* Ensure the new table is visible to readers. */ + smp_wmb(); + for (old_hash = 0; old_hash < old_tbl->size; old_hash++) rhashtable_rehash_chain(ht, old_hash); @@ -618,6 +621,9 @@ restart: return rht_obj(ht, he); } + /* Ensure we see any new tables. */ + smp_rmb(); + old_tbl = tbl; tbl = rht_dereference_rcu(ht->future_tbl, ht); if (unlikely(tbl != old_tbl)) |