From d5cc4a73a5b5c8374b810d5371e9e7ed05c1e02c Mon Sep 17 00:00:00 2001 From: Robert Olsson Date: Fri, 16 Mar 2007 15:00:07 -0700 Subject: [PATCH] [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 Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/ipv4/fib_trie.c | 2 -- 1 file changed, 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; } -- 2.39.5