netdev - [PATCH 1/5 net-next] rhashtable: Extend RCU read lock into rhashtable_insert

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Message-Id: <d12cd2734040e1cfb4fb04e78d51ec6c12a538c2.1427202823.git.tgraf@suug.ch>
Date:	Tue, 24 Mar 2015 14:18:16 +0100
From:	Thomas Graf <tgraf@...g.ch>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, herbert@...dor.apana.org.au
Subject: [PATCH 1/5 net-next] rhashtable: Extend RCU read lock into rhashtable_insert_rehash()

rhashtable_insert_rehash() requires RCU locks to be held in order
to access ht->tbl and traverse to the last table.

Fixes: ccd57b1bd324 ("rhashtable: Add immediate rehash during insertion")
Signed-off-by: Thomas Graf <tgraf@...g.ch>
---
 include/linux/rhashtable.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/rhashtable.h b/include/linux/rhashtable.h
index d7be9cb..5976ab5 100644
--- a/include/linux/rhashtable.h
+++ b/include/linux/rhashtable.h
@@ -585,8 +585,8 @@ restart:
 	if (unlikely(rht_grow_above_100(ht, tbl))) {
 slow_path:
 		spin_unlock_bh(lock);
-		rcu_read_unlock();
 		err = rhashtable_insert_rehash(ht);
+		rcu_read_unlock();
 		if (err)
 			return err;
 
-- 
1.9.3

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