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| author |   Robert Olsson <robert.olsson@its.uu.se> | 2007-03-16 15:00:07 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2007-03-16 15:00:07 -0700 |
| commit | d5cc4a73a5b5c8374b810d5371e9e7ed05c1e02c (patch) | |
| tree | 9fc98bedcecf6f910ec0c76f28e15fbda1ff6f1e /net | |
| parent | Linux 2.6.21-rc4 (diff) | |
| download | linux-dev-d5cc4a73a5b5c8374b810d5371e9e7ed05c1e02c.tar.xz linux-dev-d5cc4a73a5b5c8374b810d5371e9e7ed05c1e02c.zip | |
[IPV4]: Do not disable preemption in trie_leaf_remove().
Hello, Just discussed this Patrick...
We have two users of trie_leaf_remove, fn_trie_flush and fn_trie_delete
both are holding RTNL. So there shouldn't be need for this preempt stuff.
This is assumed to a leftover from an older RCU-take.
> Mhh .. I think I just remembered something - me incorrectly suggesting
> to add it there while we were talking about this at OLS :) IIRC the
> idea was to make sure tnode_free (which at that time didn't use
> call_rcu) wouldn't free memory while still in use in a rcu read-side
> critical section. It should have been synchronize_rcu of course,
> but with tnode_free using call_rcu it seems to be completely
> unnecessary. So I guess we can simply remove it.
Signed-off-by: Robert Olsson <robert.olsson@its.uu.se>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/fib_trie.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c index 72b3036bbc09..ada9b3db507d 100644 --- a/net/ipv4/fib_trie.c +++ b/net/ipv4/fib_trie.c @@ -1527,7 +1527,6 @@ static int trie_leaf_remove(struct trie *t, t_key key) t->revision++; t->size--; - preempt_disable(); tp = NODE_PARENT(n); tnode_free((struct tnode *) n); @@ -1537,7 +1536,6 @@ static int trie_leaf_remove(struct trie *t, t_key key) rcu_assign_pointer(t->trie, trie_rebalance(t, tp)); } else rcu_assign_pointer(t->trie, NULL); - preempt_enable(); return 1; } |