idr: Delete idr_replace_ext function

Changing idr_replace's 'id' argument to 'unsigned long' works for all
callers.  Callers which passed a negative ID now get -ENOENT instead of
-EINVAL.  No callers relied on this error value.

Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>

include/linux/idr.h

@@ -136,8 +136,7 @@ int idr_for_each(const struct idr *,
 		 int (*fn)(int id, void *p, void *data), void *data);
 void *idr_get_next(struct idr *, int *nextid);
 void *idr_get_next_ext(struct idr *idr, unsigned long *nextid);
-void *idr_replace(struct idr *, void *, int id);
-void *idr_replace_ext(struct idr *idr, void *ptr, unsigned long id);
+void *idr_replace(struct idr *, void *, unsigned long id);
 void idr_destroy(struct idr *);
 
 static inline void *idr_remove(struct idr *idr, unsigned long id)

lib/idr.c

@@ -147,18 +147,9 @@ EXPORT_SYMBOL(idr_get_next_ext);
  * the one being replaced!).
  *
  * Returns: the old value on success.  %-ENOENT indicates that @id was not
- * found.  %-EINVAL indicates that @id or @ptr were not valid.
+ * found.  %-EINVAL indicates that @ptr was not valid.
  */
-void *idr_replace(struct idr *idr, void *ptr, int id)
-{
-	if (id < 0)
-		return ERR_PTR(-EINVAL);
-
-	return idr_replace_ext(idr, ptr, id);
-}
-EXPORT_SYMBOL(idr_replace);
-
-void *idr_replace_ext(struct idr *idr, void *ptr, unsigned long id)
+void *idr_replace(struct idr *idr, void *ptr, unsigned long id)
 {
 	struct radix_tree_node *node;
 	void __rcu **slot = NULL;
@@ -175,7 +166,7 @@ void *idr_replace_ext(struct idr *idr, void *ptr, unsigned long id)
 
 	return entry;
 }
-EXPORT_SYMBOL(idr_replace_ext);
+EXPORT_SYMBOL(idr_replace);
 
 /**
  * DOC: IDA description

net/sched/act_api.c

@@ -348,7 +348,7 @@ void tcf_idr_insert(struct tc_action_net *tn, struct tc_action *a)
 	struct tcf_idrinfo *idrinfo = tn->idrinfo;
 
 	spin_lock_bh(&idrinfo->lock);
-	idr_replace_ext(&idrinfo->action_idr, a, a->tcfa_index);
+	idr_replace(&idrinfo->action_idr, a, a->tcfa_index);
 	spin_unlock_bh(&idrinfo->lock);
 }
 EXPORT_SYMBOL(tcf_idr_insert);

net/sched/cls_basic.c

@@ -235,7 +235,7 @@ static int basic_change(struct net *net, struct sk_buff *in_skb,
 	*arg = fnew;
 
 	if (fold) {
-		idr_replace_ext(&head->handle_idr, fnew, fnew->handle);
+		idr_replace(&head->handle_idr, fnew, fnew->handle);
 		list_replace_rcu(&fold->link, &fnew->link);
 		tcf_unbind_filter(tp, &fold->res);
 		tcf_exts_get_net(&fold->exts);

net/sched/cls_bpf.c

@@ -526,7 +526,7 @@ static int cls_bpf_change(struct net *net, struct sk_buff *in_skb,
 		prog->gen_flags |= TCA_CLS_FLAGS_NOT_IN_HW;
 
 	if (oldprog) {
-		idr_replace_ext(&head->handle_idr, prog, handle);
+		idr_replace(&head->handle_idr, prog, handle);
 		list_replace_rcu(&oldprog->link, &prog->link);
 		tcf_unbind_filter(tp, &oldprog->res);
 		tcf_exts_get_net(&oldprog->exts);

net/sched/cls_flower.c

@@ -967,7 +967,7 @@ static int fl_change(struct net *net, struct sk_buff *in_skb,
 
 	if (fold) {
 		fnew->handle = handle;
-		idr_replace_ext(&head->handle_idr, fnew, fnew->handle);
+		idr_replace(&head->handle_idr, fnew, fnew->handle);
 		list_replace_rcu(&fold->list, &fnew->list);
 		tcf_unbind_filter(tp, &fold->res);
 		tcf_exts_get_net(&fold->exts);

net/sched/cls_u32.c

@@ -848,7 +848,7 @@ static void u32_replace_knode(struct tcf_proto *tp, struct tc_u_common *tp_c,
 		if (pins->handle == n->handle)
 			break;
 
-	idr_replace_ext(&ht->handle_idr, n, n->handle);
+	idr_replace(&ht->handle_idr, n, n->handle);
 	RCU_INIT_POINTER(n->next, pins->next);
 	rcu_assign_pointer(*ins, n);
 }