nf_log_unregister() (which is what gets called in the logger backends
module exit paths) does a (required, module is removed) synchronize_rcu().

But nf_log_unset() is only called from pernet exit handlers. It doesn't
free any memory so there appears to be no need to call synchronize_rcu.

Signed-off-by: Florian Westphal <[email protected]>
---
 net/netfilter/nf_log.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/net/netfilter/nf_log.c b/net/netfilter/nf_log.c
index cc32727e3f32..8bb152a7cca4 100644
--- a/net/netfilter/nf_log.c
+++ b/net/netfilter/nf_log.c
@@ -71,7 +71,6 @@ void nf_log_unset(struct net *net, const struct nf_logger 
*logger)
                        RCU_INIT_POINTER(net->nf.nf_loggers[i], NULL);
        }
        mutex_unlock(&nf_log_mutex);
-       synchronize_rcu();
 }
 EXPORT_SYMBOL(nf_log_unset);
 
-- 
2.10.2

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