diff options
Diffstat (limited to 'lib/rhashtable.c')
| -rw-r--r-- | lib/rhashtable.c | 29 |
1 files changed, 20 insertions, 9 deletions
diff --git a/lib/rhashtable.c b/lib/rhashtable.c index 6c4f5c8e9baa..b28fdd560ea9 100644 --- a/lib/rhashtable.c +++ b/lib/rhashtable.c @@ -237,8 +237,10 @@ static int rhashtable_rehash_one(struct rhashtable *ht, unsigned int old_hash) goto out; err = -ENOENT; + if (!pprev) + goto out; - rht_for_each(entry, old_tbl, old_hash) { + rht_for_each_from(entry, *pprev, old_tbl, old_hash) { err = 0; next = rht_dereference_bucket(entry->next, old_tbl, old_hash); @@ -496,6 +498,8 @@ static void *rhashtable_lookup_one(struct rhashtable *ht, elasticity = RHT_ELASTICITY; pprev = rht_bucket_var(tbl, hash); + if (!pprev) + return ERR_PTR(-ENOENT); rht_for_each_from(head, *pprev, tbl, hash) { struct rhlist_head *list; struct rhlist_head *plist; @@ -1161,11 +1165,10 @@ void rhashtable_destroy(struct rhashtable *ht) } EXPORT_SYMBOL_GPL(rhashtable_destroy); -struct rhash_head __rcu **rht_bucket_nested(const struct bucket_table *tbl, - unsigned int hash) +struct rhash_head __rcu **__rht_bucket_nested(const struct bucket_table *tbl, + unsigned int hash) { const unsigned int shift = PAGE_SHIFT - ilog2(sizeof(void *)); - static struct rhash_head __rcu *rhnull; unsigned int index = hash & ((1 << tbl->nest) - 1); unsigned int size = tbl->size >> tbl->nest; unsigned int subhash = hash; @@ -1183,15 +1186,23 @@ struct rhash_head __rcu **rht_bucket_nested(const struct bucket_table *tbl, subhash >>= shift; } - if (!ntbl) { - if (!rhnull) - INIT_RHT_NULLS_HEAD(rhnull); - return &rhnull; - } + if (!ntbl) + return NULL; return &ntbl[subhash].bucket; } +EXPORT_SYMBOL_GPL(__rht_bucket_nested); + +struct rhash_head __rcu **rht_bucket_nested(const struct bucket_table *tbl, + unsigned int hash) +{ + static struct rhash_head __rcu *rhnull; + + if (!rhnull) + INIT_RHT_NULLS_HEAD(rhnull); + return __rht_bucket_nested(tbl, hash) ?: &rhnull; +} EXPORT_SYMBOL_GPL(rht_bucket_nested); struct rhash_head __rcu **rht_bucket_nested_insert(struct rhashtable *ht, |