From 43aa46378057e6c57f8e17621601b15869c520e4 Mon Sep 17 00:00:00 2001
From: Dave Wysochanski <dwysocha@redhat.com>
Date: Wed, 26 Mar 2008 16:20:54 +0000
Subject: [PATCH] Add list_move() support function for list manipulation.

---
 WHATS_NEW               |  3 ++-
 lib/datastruct/list.h   | 10 ++++++++++
 libdm/datastruct/list.h | 10 ++++++++++
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/WHATS_NEW b/WHATS_NEW
index 3726741c4..1075cd871 100644
--- a/WHATS_NEW
+++ b/WHATS_NEW
@@ -1,6 +1,7 @@
 Version 2.02.34 -
 ===================================
-  Add 'is_reserved_lvname()' helper function.
+  Add list_move() for moving elements from one list to another.
+  Add 'is_reserved_lvname()' for identifying hidden LVs.
   Correct command name in lvmdiskscan man page.
   clvmd no longer crashes if it sees nodeids over 50.
   Fix potential deadlock in clvmd thread handling.
diff --git a/lib/datastruct/list.h b/lib/datastruct/list.h
index 7b4892df7..340e9f479 100644
--- a/lib/datastruct/list.h
+++ b/lib/datastruct/list.h
@@ -54,6 +54,16 @@ void list_add_h(struct list *head, struct list *elem);
  */
 void list_del(struct list *elem);
 
+/*
+ * Move an element from an existing list to list 'head'.
+ * Insert the element before 'head'.
+ */
+static inline void list_move(struct list *item, struct list *head)
+{
+        list_del(item);
+        list_add(head, item);
+}
+
 /*
  * Is the list empty?
  */
diff --git a/libdm/datastruct/list.h b/libdm/datastruct/list.h
index 7b4892df7..340e9f479 100644
--- a/libdm/datastruct/list.h
+++ b/libdm/datastruct/list.h
@@ -54,6 +54,16 @@ void list_add_h(struct list *head, struct list *elem);
  */
 void list_del(struct list *elem);
 
+/*
+ * Move an element from an existing list to list 'head'.
+ * Insert the element before 'head'.
+ */
+static inline void list_move(struct list *item, struct list *head)
+{
+        list_del(item);
+        list_add(head, item);
+}
+
 /*
  * Is the list empty?
  */