[PATCH] hlist_add_after() fix

From: "Pedro Emanuel M. D. Pinto" <pepinto@student.dei.uc.pt>

This currently-unused function is incorrectly implemented.  Fix.

diff --git a/include/linux/list.h b/include/linux/list.h
index 34fd74e050df462fbc20f3321ce32b82318a501b..9e0c971ded6f7284328c747d03e45e401ac59944 100644 (file)
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -610,9 +610,12 @@ static inline void hlist_add_before(struct hlist_node *n,
 static inline void hlist_add_after(struct hlist_node *n,
                                        struct hlist_node *next)
 {
-       next->next      = n->next;
-       *(next->pprev)  = n;
-       n->next         = next;
+       next->next = n->next;
+       n->next = next;
+       next->pprev = &n->next;
+
+       if(next->next)
+               next->next->pprev  = &next->next;
 }
 
 #define hlist_entry(ptr, type, member) container_of(ptr,type,member)