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Message-ID: <ZDQZeSe5OaFlNKso@corigine.com>
Date:   Mon, 10 Apr 2023 16:13:13 +0200
From:   Simon Horman <simon.horman@...igine.com>
To:     Song Yoong Siang <yoong.siang.song@...el.com>
Cc:     Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        Stanislav Fomichev <sdf@...gle.com>,
        Alexander Duyck <alexanderduyck@...com>,
        Ong Boon Leong <boon.leong.ong@...el.com>,
        netdev@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        bpf@...r.kernel.org, xdp-hints@...-project.net
Subject: Re: [PATCH net-next 3/4] net: stmmac: add Rx HWTS metadata to XDP
 receive pkt

On Mon, Apr 10, 2023 at 06:09:38PM +0800, Song Yoong Siang wrote:
> Add receive hardware timestamp metadata support via kfunc to XDP receive
> packets.
> 
> Signed-off-by: Song Yoong Siang <yoong.siang.song@...el.com>

...

> @@ -7071,6 +7073,22 @@ void stmmac_fpe_handshake(struct stmmac_priv *priv, bool enable)
>  	}
>  }
>  
> +static int stmmac_xdp_rx_timestamp(const struct xdp_md *_ctx, u64 *timestamp)
> +{
> +	const struct stmmac_xdp_buff *ctx = (void *)_ctx;
> +
> +	if (ctx->rx_hwts) {
> +		*timestamp = ctx->rx_hwts;
> +		return 0;
> +	}
> +
> +	return -ENODATA;
> +}
> +
> +const struct xdp_metadata_ops stmmac_xdp_metadata_ops = {
> +	.xmo_rx_timestamp		= stmmac_xdp_rx_timestamp,
> +};

sparse seems to think this should be static.

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c:7082:31: warning: symbol 'stmmac_xdp_metadata_ops' was not declared. Should it be static?

Link: https://patchwork.kernel.org/project/netdevbpf/patch/20230410100939.331833-4-yoong.siang.song@intel.com/

> +
>  /**
>   * stmmac_dvr_probe
>   * @device: device pointer

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