[PATCH] add klist_node_attached() to determine if a node is on a list or not.
Signed-off-by: Patrick Mochel <mochel@digitalimplant.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff -Nru a/include/linux/klist.h b/include/linux/klist.h
diff --git a/lib/klist.c b/lib/klist.c
index 6f76042..02177d7 100644
--- a/lib/klist.c
+++ b/lib/klist.c
@@ -112,6 +112,7 @@
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)
@@ -154,6 +155,19 @@
/**
+ * 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.
* @i: klist_iter we're filling.
@@ -246,3 +260,5 @@
}
EXPORT_SYMBOL_GPL(klist_next);
+
+