---

yaml
---
r: 121868
b: refs/heads/master
c: 5635c10
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 536533e69e3e4a9f0174509813f8df28970d6ebe
+refs/heads/master: 5635c10d976716ef47ae441998aeae144c7e7387

trunk/include/net/dst.h

@@ -61,6 +61,8 @@ struct dst_entry
 	struct hh_cache		*hh;
 #ifdef CONFIG_XFRM
 	struct xfrm_state	*xfrm;
+#else
+	void			*__pad1;
 #endif
 	int			(*input)(struct sk_buff*);
 	int			(*output)(struct sk_buff*);
@@ -71,8 +73,20 @@ struct dst_entry
 
 #ifdef CONFIG_NET_CLS_ROUTE
 	__u32			tclassid;
+#else
+	__u32			__pad2;
 #endif
 
+
+	/*
+	 * Align __refcnt to a 64 bytes alignment
+	 * (L1_CACHE_SIZE would be too much)
+	 */
+#ifdef CONFIG_64BIT
+	long			__pad_to_align_refcnt[2];
+#else
+	long			__pad_to_align_refcnt[1];
+#endif
 	/*
 	 * __refcnt wants to be on a different cache line from
 	 * input/output/ops or performance tanks badly
@@ -157,6 +171,11 @@ dst_metric_locked(struct dst_entry *dst, int metric)
 
 static inline void dst_hold(struct dst_entry * dst)
 {
+	/*
+	 * If your kernel compilation stops here, please check
+	 * __pad_to_align_refcnt declaration in struct dst_entry
+	 */
+	BUILD_BUG_ON(offsetof(struct dst_entry, __refcnt) & 63);
 	atomic_inc(&dst->__refcnt);
 }