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authorMichael S. Tsirkin <mst@mellanox.co.il>2006-02-20 21:50:39 -0800
committerRoland Dreier <rolandd@cisco.com>2006-03-20 10:08:16 -0800
commit44af79f9524c29d6850591cc972f2667a27234d4 (patch)
tree8d88bdbd7c3fd015c692792bf1fcd3600ba0c275 /drivers/infiniband
parent4d9781c5ce1a517a07dbf03c37323c011037fe79 (diff)
IPoIB: clarify to_ipoib_neigh()
Cosmetic change: make alignment explicit in to_ipoib_neigh. Signed-off-by: Michael S. Tsirkin <mst@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/ulp/ipoib/ipoib.h10
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib.h b/drivers/infiniband/ulp/ipoib/ipoib.h
index 2f85a9a831b1..638eff745b2f 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib.h
+++ b/drivers/infiniband/ulp/ipoib/ipoib.h
@@ -217,10 +217,16 @@ struct ipoib_neigh {
struct list_head list;
};
+/*
+ * We stash a pointer to our private neighbour information after our
+ * hardware address in neigh->ha. The ALIGN() expression here makes
+ * sure that this pointer is stored aligned so that an unaligned
+ * load is not needed to dereference it.
+ */
static inline struct ipoib_neigh **to_ipoib_neigh(struct neighbour *neigh)
{
- return (struct ipoib_neigh **) (neigh->ha + 24 -
- (offsetof(struct neighbour, ha) & 4));
+ return (void*) neigh + ALIGN(offsetof(struct neighbour, ha) +
+ INFINIBAND_ALEN, sizeof(void *));
}
extern struct workqueue_struct *ipoib_workqueue;