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authorEric Dumazet <dada1@cosmosbay.com>2008-11-16 19:39:21 -0800
committerDavid S. Miller <davem@davemloft.net>2008-11-16 19:39:21 -0800
commit88ab1932eac721c6e7336708558fa5ed02c85c80 (patch)
treec8788a1e3de08100bca341fa4180adfe5d02880f /include/linux
parentbbaffaca4810de1a25e32ecaf836eeaacc7a3d11 (diff)
udp: Use hlist_nulls in UDP RCU code
This is a straightforward patch, using hlist_nulls infrastructure. RCUification already done on UDP two weeks ago. Using hlist_nulls permits us to avoid some memory barriers, both at lookup time and delete time. Patch is large because it adds new macros to include/net/sock.h. These macros will be used by TCP & DCCP in next patch. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/rculist.h17
1 files changed, 0 insertions, 17 deletions
diff --git a/include/linux/rculist.h b/include/linux/rculist.h
index 3ba2998b22b..e649bd3f2c9 100644
--- a/include/linux/rculist.h
+++ b/include/linux/rculist.h
@@ -383,22 +383,5 @@ static inline void hlist_add_after_rcu(struct hlist_node *prev,
({ tpos = hlist_entry(pos, typeof(*tpos), member); 1; }); \
pos = rcu_dereference(pos->next))
-/**
- * hlist_for_each_entry_rcu_safenext - iterate over rcu list of given type
- * @tpos: the type * to use as a loop cursor.
- * @pos: the &struct hlist_node to use as a loop cursor.
- * @head: the head for your list.
- * @member: the name of the hlist_node within the struct.
- * @next: the &struct hlist_node to use as a next cursor
- *
- * Special version of hlist_for_each_entry_rcu that make sure
- * each next pointer is fetched before each iteration.
- */
-#define hlist_for_each_entry_rcu_safenext(tpos, pos, head, member, next) \
- for (pos = rcu_dereference((head)->first); \
- pos && ({ next = pos->next; smp_rmb(); prefetch(next); 1; }) && \
- ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1; }); \
- pos = rcu_dereference(next))
-
#endif /* __KERNEL__ */
#endif