netdev - [PATCH net-next 07/12] net: bridge: use new function dev_fetch_sw

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Date:   Sun, 11 Oct 2020 21:40:50 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Bjørn Mork <bjorn@...k.no>,
        Oliver Neukum <oneukum@...e.com>,
        Igor Mitsyanko <imitsyanko@...ntenna.com>,
        Sergey Matyukevich <geomatsi@...il.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        Roopa Prabhu <roopa@...dia.com>,
        Nikolay Aleksandrov <nikolay@...dia.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        Johannes Berg <johannes@...solutions.net>,
        Pravin B Shelar <pshelar@....org>,
        Steffen Klassert <steffen.klassert@...unet.com>,
        Herbert Xu <herbert@...dor.apana.org.au>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        linux-rdma@...r.kernel.org,
        Linux USB Mailing List <linux-usb@...r.kernel.org>,
        linux-wireless <linux-wireless@...r.kernel.org>,
        bridge@...ts.linux-foundation.org
Subject: [PATCH net-next 07/12] net: bridge: use new function
 dev_fetch_sw_netstats

Simplify the code by using new function dev_fetch_sw_netstats().

Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
 net/bridge/br_device.c | 21 +--------------------
 1 file changed, 1 insertion(+), 20 deletions(-)

diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index 9a2fb4aa1..6f742fee8 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -206,27 +206,8 @@ static void br_get_stats64(struct net_device *dev,
 			   struct rtnl_link_stats64 *stats)
 {
 	struct net_bridge *br = netdev_priv(dev);
-	struct pcpu_sw_netstats tmp, sum = { 0 };
-	unsigned int cpu;
-
-	for_each_possible_cpu(cpu) {
-		unsigned int start;
-		const struct pcpu_sw_netstats *bstats
-			= per_cpu_ptr(br->stats, cpu);
-		do {
-			start = u64_stats_fetch_begin_irq(&bstats->syncp);
-			memcpy(&tmp, bstats, sizeof(tmp));
-		} while (u64_stats_fetch_retry_irq(&bstats->syncp, start));
-		sum.tx_bytes   += tmp.tx_bytes;
-		sum.tx_packets += tmp.tx_packets;
-		sum.rx_bytes   += tmp.rx_bytes;
-		sum.rx_packets += tmp.rx_packets;
-	}
 
-	stats->tx_bytes   = sum.tx_bytes;
-	stats->tx_packets = sum.tx_packets;
-	stats->rx_bytes   = sum.rx_bytes;
-	stats->rx_packets = sum.rx_packets;
+	dev_fetch_sw_netstats(stats, br->stats);
 }
 
 static int br_change_mtu(struct net_device *dev, int new_mtu)
-- 
2.28.0