diff options
| author | Robert Olsson <robert.olsson@its.uu.se> | 2007-03-16 18:30:13 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-03-23 12:49:24 -0700 |
| commit | aa2bb55bbc1e890e1c1fefe72a953c476cb867a3 (patch) | |
| tree | c57457226add8631bb09ff811b7a71d79d8d853b /net | |
| parent | 380974c0843a390d460446f79c5dea3b56046e66 (diff) | |
Fix GFP_KERNEL with preemption disabled in fib_trie
[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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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 1e589b91605e..a742ea3ff1d0 100644 --- a/net/ipv4/fib_trie.c +++ b/net/ipv4/fib_trie.c @@ -1528,7 +1528,6 @@ 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); @@ -1538,7 +1537,6 @@ 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; } |