netdev - Re: [RFC PATCH 01/13] net: dsa: add plumbing for custom netdev statistics

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Message-ID: <20201017231551.GX456889@lunn.ch>
Date:   Sun, 18 Oct 2020 01:15:51 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     netdev@...r.kernel.org, f.fainelli@...il.com,
        vivien.didelot@...il.com, kuba@...nel.org,
        Christian Eggers <ceggers@...i.de>,
        Kurt Kanzenbach <kurt@...utronix.de>
Subject: Re: [RFC PATCH 01/13] net: dsa: add plumbing for custom netdev
 statistics

> +/* Driver statistics, other than those in struct rtnl_link_stats64.
> + * These are collected per-CPU and aggregated by ethtool.
> + */
> +struct dsa_slave_stats {
> +	__u64			tx_reallocs;
> +	struct u64_stats_sync	syncp;
> +} __aligned(1 * sizeof(u64));

The convention seems to be to use a prefix of pcpu_,
e.g. pcpu_sw_netstats, pcpu_lstats.

Also, why __u64? Neither pcpu_sw_netstats nor pcpu_lstats use __u64.

      Andrew