rhashtable: Remove obsolete rhashtable_walk_init function

The rhashtable_walk_init function has been obsolete for more than
two years.  This patch finally converts its last users over to
rhashtable_walk_enter and removes it.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

include/linux/rhashtable.h

@@ -1113,14 +1113,6 @@ static inline int rhashtable_replace_fast(
 	return err;
 }
 
-/* Obsolete function, do not use in new code. */
-static inline int rhashtable_walk_init(struct rhashtable *ht,
-				       struct rhashtable_iter *iter, gfp_t gfp)
-{
-	rhashtable_walk_enter(ht, iter);
-	return 0;
-}
-
 /**
  * rhltable_walk_enter - Initialise an iterator
  * @hlt:	Table to walk over

lib/rhashtable.c

@@ -682,7 +682,7 @@ EXPORT_SYMBOL_GPL(rhashtable_walk_enter);
  * rhashtable_walk_exit - Free an iterator
  * @iter:	Hash table Iterator
  *
- * This function frees resources allocated by rhashtable_walk_init.
+ * This function frees resources allocated by rhashtable_walk_enter.
  */
 void rhashtable_walk_exit(struct rhashtable_iter *iter)
 {

lib/test_rhashtable.c

@@ -177,16 +177,11 @@ static int __init test_rht_lookup(struct rhashtable *ht, struct test_obj *array,
 
 static void test_bucket_stats(struct rhashtable *ht, unsigned int entries)
 {
-	unsigned int err, total = 0, chain_len = 0;
+	unsigned int total = 0, chain_len = 0;
 	struct rhashtable_iter hti;
 	struct rhash_head *pos;
 
-	err = rhashtable_walk_init(ht, &hti, GFP_KERNEL);
-	if (err) {
-		pr_warn("Test failed: allocation error");
-		return;
-	}
-
+	rhashtable_walk_enter(ht, &hti);
 	rhashtable_walk_start(&hti);
 
 	while ((pos = rhashtable_walk_next(&hti))) {

net/ipv6/ila/ila_xlat.c

@@ -385,10 +385,7 @@ int ila_xlat_nl_cmd_flush(struct sk_buff *skb, struct genl_info *info)
 	spinlock_t *lock;
 	int ret;
 
-	ret = rhashtable_walk_init(&ilan->xlat.rhash_table, &iter, GFP_KERNEL);
-	if (ret)
-		goto done;
-
+	rhashtable_walk_enter(&ilan->xlat.rhash_table, &iter);
 	rhashtable_walk_start(&iter);
 
 	for (;;) {
@@ -509,23 +506,17 @@ int ila_xlat_nl_dump_start(struct netlink_callback *cb)
 	struct net *net = sock_net(cb->skb->sk);
 	struct ila_net *ilan = net_generic(net, ila_net_id);
 	struct ila_dump_iter *iter;
-	int ret;
 
 	iter = kmalloc(sizeof(*iter), GFP_KERNEL);
 	if (!iter)
 		return -ENOMEM;
 
-	ret = rhashtable_walk_init(&ilan->xlat.rhash_table, &iter->rhiter,
-				   GFP_KERNEL);
-	if (ret) {
-		kfree(iter);
-		return ret;
-	}
+	rhashtable_walk_enter(&ilan->xlat.rhash_table, &iter->rhiter);
 
 	iter->skip = 0;
 	cb->args[0] = (long)iter;
 
-	return ret;
+	return 0;
 }
 
 int ila_xlat_nl_dump_done(struct netlink_callback *cb)

net/netlink/af_netlink.c

@@ -2549,15 +2549,7 @@ struct nl_seq_iter {
 
 static int netlink_walk_start(struct nl_seq_iter *iter)
 {
-	int err;
-
-	err = rhashtable_walk_init(&nl_table[iter->link].hash, &iter->hti,
-				   GFP_KERNEL);
-	if (err) {
-		iter->link = MAX_LINKS;
-		return err;
-	}
-
+	rhashtable_walk_enter(&nl_table[iter->link].hash, &iter->hti);
 	rhashtable_walk_start(&iter->hti);
 
 	return 0;