netdev - [PATCH 3/6] rhashtable: Wait for RCU readers after final unzip work

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Message-Id: <0e0f3cbeea3fbec2810e2d8955c1d83b5a695122.1422576760.git.tgraf@suug.ch>
Date:	Fri, 30 Jan 2015 01:20:40 +0100
From:	Thomas Graf <tgraf@...g.ch>
To:	davem@...emloft.net
Cc:	netdev@...r.kernel.org, ying.xue@...driver.com
Subject: [PATCH 3/6] rhashtable: Wait for RCU readers after final unzip work

We need to wait for all RCU readers to complete after the last bit of
unzipping has been completed. Otherwise the old table is freed up
prematurely.

Fixes: 7e1e77636e36 ("lib: Resizable, Scalable, Concurrent Hash Table")
Signed-off-by: Thomas Graf <tgraf@...g.ch>
---
 lib/rhashtable.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index 17eeabc..85ec36b 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -391,6 +391,8 @@ int rhashtable_expand(struct rhashtable *ht)
 		}
 	}
 
+	synchronize_rcu();
+
 	bucket_table_free(old_tbl);
 	return 0;
 }
-- 
1.9.3

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