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authorJarek Poplawski <jarkao2@gmail.com>2009-06-18 00:28:51 -0700
committerDavid S. Miller <davem@davemloft.net>2009-06-18 00:28:51 -0700
commit7b85576d15bf2574b0a451108f59f9ad4170dd3f (patch)
treea2d8075b9d234b0a937d7dd82b95cb16b953aec7 /include/xen/interface/callback.h
parentb964758050f856e44f5fe645d03bea8a1b0b66bd (diff)
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ipv4: Fix fib_trie rebalancing, part 2
My previous patch, which explicitly delays freeing of tnodes by adding them to the list to flush them after the update is finished, isn't strict enough. It treats exceptionally tnodes without parent, assuming they are newly created, so "invisible" for the read side yet. But the top tnode doesn't have parent as well, so we have to exclude all exceptions (at least until a better way is found). Additionally we need to move rcu assignment of this node before flushing, so the return type of the trie_rebalance() function is changed. Reported-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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