[PATCH] Debug variants of linked list macros

Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/include/linux/list.h b/include/linux/list.h
index 65a5b5ceda49..a9c90287c0ff 100644
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -39,6 +39,7 @@ static inline void INIT_LIST_HEAD(struct list_head *list)
  * This is only for internal list manipulation where we know
  * the prev/next entries already!
  */
+#ifndef CONFIG_DEBUG_LIST
 static inline void __list_add(struct list_head *new,
                               struct list_head *prev,
                               struct list_head *next)
@@ -48,6 +49,11 @@ static inline void __list_add(struct list_head *new,
         new->prev = prev;
         prev->next = new;
 }
+#else
+extern void __list_add(struct list_head *new,
+                              struct list_head *prev,
+                              struct list_head *next);
+#endif
 
 /**
  * list_add - add a new entry
@@ -57,10 +63,15 @@ static inline void __list_add(struct list_head *new,
  * Insert a new entry after the specified head.
  * This is good for implementing stacks.
  */
+#ifndef CONFIG_DEBUG_LIST
 static inline void list_add(struct list_head *new, struct list_head *head)
 {
         __list_add(new, head, head->next);
 }
+#else
+extern void list_add(struct list_head *new, struct list_head *head);
+#endif
+
 
 /**
  * list_add_tail - add a new entry
@@ -153,12 +164,16 @@ static inline void __list_del(struct list_head * prev, struct list_head * next)
  * Note: list_empty on entry does not return true after this, the entry is
  * in an undefined state.
  */
+#ifndef CONFIG_DEBUG_LIST
 static inline void list_del(struct list_head *entry)
 {
         __list_del(entry->prev, entry->next);
         entry->next = LIST_POISON1;
         entry->prev = LIST_POISON2;
 }
+#else
+extern void list_del(struct list_head *entry);
+#endif
 
 /**
  * list_del_rcu - deletes entry from list without re-initialization