Merge remote-tracking branch 'asoc/fix/rt5645' into asoc-linus

[karo-tx-linux.git] / lib / rhashtable.c

diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index 2ff7ed91663ae4fd105c24ad98454a51c329cf86..51282f5797606545330a29e93b3728d843616ea9 100644 (file)
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -518,10 +518,11 @@ int rhashtable_walk_init(struct rhashtable *ht, struct rhashtable_iter *iter)
        if (!iter->walker)
                return -ENOMEM;
 
-       mutex_lock(&ht->mutex);
-       iter->walker->tbl = rht_dereference(ht->tbl, ht);
+       spin_lock(&ht->lock);
+       iter->walker->tbl =
+               rcu_dereference_protected(ht->tbl, lockdep_is_held(&ht->lock));
        list_add(&iter->walker->list, &iter->walker->tbl->walkers);
-       mutex_unlock(&ht->mutex);
+       spin_unlock(&ht->lock);
 
        return 0;
 }
@@ -535,10 +536,10 @@ EXPORT_SYMBOL_GPL(rhashtable_walk_init);
  */
 void rhashtable_walk_exit(struct rhashtable_iter *iter)
 {
-       mutex_lock(&iter->ht->mutex);
+       spin_lock(&iter->ht->lock);
        if (iter->walker->tbl)
                list_del(&iter->walker->list);
-       mutex_unlock(&iter->ht->mutex);
+       spin_unlock(&iter->ht->lock);
        kfree(iter->walker);
 }
 EXPORT_SYMBOL_GPL(rhashtable_walk_exit);
@@ -562,14 +563,12 @@ int rhashtable_walk_start(struct rhashtable_iter *iter)
 {
        struct rhashtable *ht = iter->ht;
 
-       mutex_lock(&ht->mutex);
+       rcu_read_lock();
 
+       spin_lock(&ht->lock);
        if (iter->walker->tbl)
                list_del(&iter->walker->list);
-
-       rcu_read_lock();
-
-       mutex_unlock(&ht->mutex);
+       spin_unlock(&ht->lock);
 
        if (!iter->walker->tbl) {
                iter->walker->tbl = rht_dereference_rcu(ht->tbl, ht);
@@ -738,9 +737,6 @@ int rhashtable_init(struct rhashtable *ht,
        if (params->nulls_base && params->nulls_base < (1U << RHT_BASE_SHIFT))
                return -EINVAL;
 
-       if (params->nelem_hint)
-               size = rounded_hashtable_size(params);
-
        memset(ht, 0, sizeof(*ht));
        mutex_init(&ht->mutex);
        spin_lock_init(&ht->lock);
@@ -760,6 +756,9 @@ int rhashtable_init(struct rhashtable *ht,
 
        ht->p.min_size = max(ht->p.min_size, HASH_MIN_SIZE);
 
+       if (params->nelem_hint)
+               size = rounded_hashtable_size(&ht->p);
+
        /* The maximum (not average) chain length grows with the
         * size of the hash table, at a rate of (log N)/(log log N).
         * The value of 16 is selected so that even if the hash