sctp: protocol.c call rcu_barrier() on unload.
authorJesper Dangaard Brouer <hawk@comx.dk>
Mon, 8 Jun 2009 03:11:43 +0000 (03:11 +0000)
committerDavid S. Miller <davem@davemloft.net>
Wed, 10 Jun 2009 08:11:25 +0000 (01:11 -0700)
On module unload call rcu_barrier(), this is needed as synchronize_rcu()
is not strong enough.  The kmem_cache_destroy() does invoke
synchronize_rcu() but it does not provide same protection.

Signed-off-by: Jesper Dangaard Brouer <hawk@comx.dk>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/sctp/protocol.c

index cb2c50dbd4217284e2a267416de25ea65dd82574..79cbd47f4df7482b08e11c976d290b5b94ee545b 100644 (file)
@@ -1370,6 +1370,8 @@ SCTP_STATIC __exit void sctp_exit(void)
        sctp_proc_exit();
        cleanup_sctp_mibs();
 
+       rcu_barrier(); /* Wait for completion of call_rcu()'s */
+
        kmem_cache_destroy(sctp_chunk_cachep);
        kmem_cache_destroy(sctp_bucket_cachep);
 }