Update from upstream with manual merge of Yasunori Goto's

changes to swiotlb.c made in commit 281dd25cdc0d6903929b79183816d151ea626341
since this file has been moved from arch/ia64/lib/swiotlb.c to
lib/swiotlb.c

Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h
index 7e1e15f934f3..fd7af86151b1 100644
--- a/include/linux/inetdevice.h
+++ b/include/linux/inetdevice.h
@@ -142,13 +142,21 @@ static __inline__ int bad_mask(u32 mask, u32 addr)
 
 #define endfor_ifa(in_dev) }
 
+static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
+{
+        struct in_device *in_dev = dev->ip_ptr;
+        if (in_dev)
+                in_dev = rcu_dereference(in_dev);
+        return in_dev;
+}
+
 static __inline__ struct in_device *
 in_dev_get(const struct net_device *dev)
 {
         struct in_device *in_dev;
 
         rcu_read_lock();
-        in_dev = dev->ip_ptr;
+        in_dev = __in_dev_get_rcu(dev);
         if (in_dev)
                 atomic_inc(&in_dev->refcnt);
         rcu_read_unlock();
@@ -156,7 +164,7 @@ in_dev_get(const struct net_device *dev)
 }
 
 static __inline__ struct in_device *
-__in_dev_get(const struct net_device *dev)
+__in_dev_get_rtnl(const struct net_device *dev)
 {
         return (struct in_device*)dev->ip_ptr;
 }