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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/drivers/net/nlmon.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 #include <linux/module.h>
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 #include <linux/kernel.h>
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 #include <linux/netdevice.h>
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@@ -6,21 +7,9 @@
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 #include <linux/if_arp.h>
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 #include <net/rtnetlink.h>
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-struct pcpu_lstats {
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-	u64 packets;
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-	u64 bytes;
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-	struct u64_stats_sync syncp;
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-};
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-
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 static netdev_tx_t nlmon_xmit(struct sk_buff *skb, struct net_device *dev)
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 {
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-	int len = skb->len;
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-	struct pcpu_lstats *stats = this_cpu_ptr(dev->lstats);
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-
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-	u64_stats_update_begin(&stats->syncp);
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-	stats->bytes += len;
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-	stats->packets++;
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-	u64_stats_update_end(&stats->syncp);
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+	dev_lstats_add(dev, skb->len);
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13
 
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 	dev_kfree_skb(skb);
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15
 
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@@ -61,25 +50,9 @@
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 static void
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 nlmon_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
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 {
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-	int i;
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-	u64 bytes = 0, packets = 0;
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+	u64 packets, bytes;
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-	for_each_possible_cpu(i) {
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-		const struct pcpu_lstats *nl_stats;
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-		u64 tbytes, tpackets;
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-		unsigned int start;
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-
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-		nl_stats = per_cpu_ptr(dev->lstats, i);
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-
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-		do {
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-			start = u64_stats_fetch_begin_irq(&nl_stats->syncp);
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-			tbytes = nl_stats->bytes;
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-			tpackets = nl_stats->packets;
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-		} while (u64_stats_fetch_retry_irq(&nl_stats->syncp, start));
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-
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-		packets += tpackets;
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-		bytes += tbytes;
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-	}
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+	dev_lstats_read(dev, &packets, &bytes);
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 	stats->rx_packets = packets;
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 	stats->tx_packets = 0;