From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Hemminger Subject: [PATCH net-next 1/2] netvsc: fix RCU warning in get_stats Date: Fri, 14 Apr 2017 14:42:57 -0700 Message-ID: <20170414214258.3367-1-sthemmin@microsoft.com> Cc: netdev@vger.kernel.org, Stephen Hemminger To: davem@davemloft.net Return-path: Received: from mail-pf0-f170.google.com ([209.85.192.170]:35602 "EHLO mail-pf0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751962AbdDNVnB (ORCPT ); Fri, 14 Apr 2017 17:43:01 -0400 Received: by mail-pf0-f170.google.com with SMTP id i5so44783863pfc.2 for ; Fri, 14 Apr 2017 14:43:01 -0700 (PDT) Sender: netdev-owner@vger.kernel.org List-ID: The statistics functionis called with RTNL held during probe but with RCU held during access from /proc and elsewhere. This is safe so update the lockdep annotation. Signed-off-by: Stephen Hemminger --- drivers/net/hyperv/netvsc_drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index f24c2891dd0c..76489a06ef3b 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -897,7 +897,7 @@ static void netvsc_get_stats64(struct net_device *net, struct rtnl_link_stats64 *t) { struct net_device_context *ndev_ctx = netdev_priv(net); - struct netvsc_device *nvdev = rcu_dereference(ndev_ctx->nvdev); + struct netvsc_device *nvdev = rcu_dereference_rtnl(ndev_ctx->nvdev); int i; if (!nvdev) -- 2.11.0