X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fklist.c;h=a70c836c5c4c2617f6929407034a8706b57c4886;hb=8191151d0933d65fb6b659ffbd765479f0f200e1;hp=6f760424648bf320eef69d6baa171af0c4e31c6b;hpb=9a19fea43616066561e221359596ce532e631395;p=linux-2.6

diff --git a/lib/klist.c b/lib/klist.c
index 6f76042464..a70c836c5c 100644
--- a/lib/klist.c
+++ b/lib/klist.c
@@ -79,11 +79,11 @@ static void klist_node_init(struct klist * k, struct klist_node * n)
 
 /**
  *	klist_add_head - Initialize a klist_node and add it to front.
- *	@k:	klist it's going on.
  *	@n:	node we're adding.
+ *	@k:	klist it's going on.
  */
 
-void klist_add_head(struct klist * k, struct klist_node * n)
+void klist_add_head(struct klist_node * n, struct klist * k)
 {
 	klist_node_init(k, n);
 	add_head(k, n);
@@ -94,11 +94,11 @@ EXPORT_SYMBOL_GPL(klist_add_head);
 
 /**
  *	klist_add_tail - Initialize a klist_node and add it to back.
- *	@k:	klist it's going on.
  *	@n:	node we're adding.
+ *	@k:	klist it's going on.
  */
 
-void klist_add_tail(struct klist * k, struct klist_node * n)
+void klist_add_tail(struct klist_node * n, struct klist * k)
 {
 	klist_node_init(k, n);
 	add_tail(k, n);
@@ -112,6 +112,7 @@ static void klist_release(struct kref * kref)
 	struct klist_node * n = container_of(kref, struct klist_node, n_ref);
 	list_del(&n->n_node);
 	complete(&n->n_removed);
+	n->n_klist = NULL;
 }
 
 static int klist_dec_and_del(struct klist_node * n)
@@ -144,15 +145,29 @@ EXPORT_SYMBOL_GPL(klist_del);
 
 void klist_remove(struct klist_node * n)
 {
-	spin_lock(&n->n_klist->k_lock);
+	struct klist * k = n->n_klist;
+	spin_lock(&k->k_lock);
 	klist_dec_and_del(n);
-	spin_unlock(&n->n_klist->k_lock);
+	spin_unlock(&k->k_lock);
 	wait_for_completion(&n->n_removed);
 }
 
 EXPORT_SYMBOL_GPL(klist_remove);
 
 
+/**
+ *	klist_node_attached - Say whether a node is bound to a list or not.
+ *	@n:	Node that we're testing.
+ */
+
+int klist_node_attached(struct klist_node * n)
+{
+	return (n->n_klist != NULL);
+}
+
+EXPORT_SYMBOL_GPL(klist_node_attached);
+
+
 /**
  *	klist_iter_init_node - Initialize a klist_iter structure.
  *	@k:	klist we're iterating.
@@ -246,3 +261,5 @@ struct klist_node * klist_next(struct klist_iter * i)
 }
 
 EXPORT_SYMBOL_GPL(klist_next);
+
+