diff options
| -rw-r--r-- | lib/rhashtable.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/lib/rhashtable.c b/lib/rhashtable.c index ce450d095fdf..0bd29c178910 100644 --- a/lib/rhashtable.c +++ b/lib/rhashtable.c @@ -83,6 +83,18 @@ static u32 head_hashfn(const struct rhashtable *ht, return rht_bucket_index(tbl, obj_raw_hashfn(ht, rht_obj(ht, he))); } +static struct rhash_head __rcu **bucket_tail(struct bucket_table *tbl, u32 n) +{ + struct rhash_head __rcu **pprev; + + for (pprev = &tbl->buckets[n]; + rht_dereference_bucket(*pprev, tbl, n); + pprev = &rht_dereference_bucket(*pprev, tbl, n)->next) + ; + + return pprev; +} + static struct bucket_table *bucket_table_alloc(size_t nbuckets) { struct bucket_table *tbl; @@ -266,7 +278,6 @@ EXPORT_SYMBOL_GPL(rhashtable_expand); int rhashtable_shrink(struct rhashtable *ht) { struct bucket_table *ntbl, *tbl = rht_dereference(ht->tbl, ht); - struct rhash_head __rcu **pprev; unsigned int i; ASSERT_RHT_MUTEX(ht); @@ -286,15 +297,9 @@ int rhashtable_shrink(struct rhashtable *ht) */ for (i = 0; i < ntbl->size; i++) { ntbl->buckets[i] = tbl->buckets[i]; + RCU_INIT_POINTER(*bucket_tail(ntbl, i), + tbl->buckets[i + ntbl->size]); - /* Link each bucket in the new table to the first bucket - * in the old table that contains entries which will hash - * to the new bucket. - */ - for (pprev = &ntbl->buckets[i]; *pprev != NULL; - pprev = &rht_dereference_bucket(*pprev, ntbl, i)->next) - ; - RCU_INIT_POINTER(*pprev, tbl->buckets[i + ntbl->size]); } /* Publish the new, valid hash table */ |