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authorstephen hemminger <shemminger@vyatta.com>2010-03-17 23:31:11 +0300
committerDavid S. Miller <davem@davemloft.net>2010-03-21 01:44:35 +0300
commit5c578aedcb21d79eeb4e9cf04ca5b276ac82614c (patch)
treee6d682d3072fda2ae3977beca2beb23d222b6911 /include/linux
parentc2e21293c054817c42eb5fa9c613d2ad51954136 (diff)
downloadlinux-5c578aedcb21d79eeb4e9cf04ca5b276ac82614c.tar.xz
IPv6: convert addrconf hash list to RCU
Convert from reader/writer lock to RCU and spinlock for addrconf hash list. Adds an additional helper macro for hlist_for_each_entry_continue_rcu to handle the continue case. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/rculist.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/rculist.h b/include/linux/rculist.h
index 2c9b46cff3d7..004908b104d5 100644
--- a/include/linux/rculist.h
+++ b/include/linux/rculist.h
@@ -428,5 +428,18 @@ static inline void hlist_add_after_rcu(struct hlist_node *prev,
({ tpos = hlist_entry(pos, typeof(*tpos), member); 1; }); \
pos = rcu_dereference_raw(pos->next))
+/**
+ * hlist_for_each_entry_continue_rcu - iterate over a hlist continuing after current point
+ * @tpos: the type * to use as a loop cursor.
+ * @pos: the &struct hlist_node to use as a loop cursor.
+ * @member: the name of the hlist_node within the struct.
+ */
+#define hlist_for_each_entry_continue_rcu(tpos, pos, member) \
+ for (pos = rcu_dereference((pos)->next); \
+ pos && ({ prefetch(pos->next); 1; }) && \
+ ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1; }); \
+ pos = rcu_dereference(pos->next))
+
+
#endif /* __KERNEL__ */
#endif