These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / include / linux / list.h

diff --git a/kernel/include/linux/list.h b/kernel/include/linux/list.h
index feb773c..993395a 100644 (file)
--- a/kernel/include/linux/list.h
+++ b/kernel/include/linux/list.h
@@ -87,7 +87,7 @@ static inline void list_add_tail(struct list_head *new, struct list_head *head)
 static inline void __list_del(struct list_head * prev, struct list_head * next)
 {
        next->prev = prev;
-       prev->next = next;
+       WRITE_ONCE(prev->next, next);
 }
 
 /**
@@ -615,7 +615,8 @@ static inline void __hlist_del(struct hlist_node *n)
 {
        struct hlist_node *next = n->next;
        struct hlist_node **pprev = n->pprev;
-       *pprev = next;
+
+       WRITE_ONCE(*pprev, next);
        if (next)
                next->pprev = pprev;
 }
@@ -672,6 +673,11 @@ static inline void hlist_add_fake(struct hlist_node *n)
        n->pprev = &n->next;
 }
 
+static inline bool hlist_fake(struct hlist_node *h)
+{
+       return h->pprev == &h->next;
+}
+
 /*
  * Move a list from one list head to another. Fixup the pprev
  * reference of the first entry if it exists.