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-rw-r--r--include/linux/inetdevice.h12
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)
142 142
143#define endfor_ifa(in_dev) } 143#define endfor_ifa(in_dev) }
144 144
145static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
146{
147 struct in_device *in_dev = dev->ip_ptr;
148 if (in_dev)
149 in_dev = rcu_dereference(in_dev);
150 return in_dev;
151}
152
145static __inline__ struct in_device * 153static __inline__ struct in_device *
146in_dev_get(const struct net_device *dev) 154in_dev_get(const struct net_device *dev)
147{ 155{
148 struct in_device *in_dev; 156 struct in_device *in_dev;
149 157
150 rcu_read_lock(); 158 rcu_read_lock();
151 in_dev = dev->ip_ptr; 159 in_dev = __in_dev_get_rcu(dev);
152 if (in_dev) 160 if (in_dev)
153 atomic_inc(&in_dev->refcnt); 161 atomic_inc(&in_dev->refcnt);
154 rcu_read_unlock(); 162 rcu_read_unlock();
@@ -156,7 +164,7 @@ in_dev_get(const struct net_device *dev)
156} 164}
157 165
158static __inline__ struct in_device * 166static __inline__ struct in_device *
159__in_dev_get(const struct net_device *dev) 167__in_dev_get_rtnl(const struct net_device *dev)
160{ 168{
161 return (struct in_device*)dev->ip_ptr; 169 return (struct in_device*)dev->ip_ptr;
162} 170}