1 files changed, 68 insertions, 0 deletions
diff --git a/include/linux/klist.h b/include/linux/klist.h
new file mode 100644
index 00000000..a370ce57
--- /dev/null
+++ b/include/linux/klist.h
@@ -0,0 +1,68 @@
+/*
+ *	klist.h - Some generic list helpers, extending struct list_head a bit.
+ *
+ *	Implementations are found in lib/klist.c
+ *
+ *
+ *	Copyright (C) 2005 Patrick Mochel
+ *
+ *	This file is rleased under the GPL v2.
+ */
+
+#ifndef _LINUX_KLIST_H
+#define _LINUX_KLIST_H
+
+#include <linux/spinlock.h>
+#include <linux/kref.h>
+#include <linux/list.h>
+
+struct klist_node;
+struct klist {
+	spinlock_t		k_lock;
+	struct list_head	k_list;
+	void			(*get)(struct klist_node *);
+	void			(*put)(struct klist_node *);
+} __attribute__ ((aligned (sizeof(void *))));
+
+#define KLIST_INIT(_name, _get, _put)					\
+	{ .k_lock	= __SPIN_LOCK_UNLOCKED(_name.k_lock),		\
+	  .k_list	= LIST_HEAD_INIT(_name.k_list),			\
+	  .get		= _get,						\
+	  .put		= _put, }
+
+#define DEFINE_KLIST(_name, _get, _put)					\
+	struct klist _name = KLIST_INIT(_name, _get, _put)
+
+extern void klist_init(struct klist *k, void (*get)(struct klist_node *),
+		       void (*put)(struct klist_node *));
+
+struct klist_node {
+	void			*n_klist;	/* never access directly */
+	struct list_head	n_node;
+	struct kref		n_ref;
+};
+
+extern void klist_add_tail(struct klist_node *n, struct klist *k);
+extern void klist_add_head(struct klist_node *n, struct klist *k);
+extern void klist_add_after(struct klist_node *n, struct klist_node *pos);
+extern void klist_add_before(struct klist_node *n, struct klist_node *pos);
+
+extern void klist_del(struct klist_node *n);
+extern void klist_remove(struct klist_node *n);
+
+extern int klist_node_attached(struct klist_node *n);
+
+
+struct klist_iter {
+	struct klist		*i_klist;
+	struct klist_node	*i_cur;
+};
+
+
+extern void klist_iter_init(struct klist *k, struct klist_iter *i);
+extern void klist_iter_init_node(struct klist *k, struct klist_iter *i,
+				 struct klist_node *n);
+extern void klist_iter_exit(struct klist_iter *i);
+extern struct klist_node *klist_next(struct klist_iter *i);
+
+#endif