netdev - Re: [PATCH net] phy: mscc: Fix timestamping for vsc8584

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Message-ID: <20250801112648.4hm2h6n3b64guagi@skbuf>
Date: Fri, 1 Aug 2025 14:26:48 +0300
From: Vladimir Oltean <olteanv@...il.com>
To: Horatiu Vultur <horatiu.vultur@...rochip.com>
Cc: andrew@...n.ch, hkallweit1@...il.com, linux@...linux.org.uk,
	davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com, richardcochran@...il.com,
	viro@...iv.linux.org.uk, quentin.schulz@...tlin.com,
	atenart@...nel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] phy: mscc: Fix timestamping for vsc8584

Hi Horatiu,

On Thu, Jul 31, 2025 at 02:19:20PM +0200, Horatiu Vultur wrote:
> diff --git a/drivers/net/phy/mscc/mscc.h b/drivers/net/phy/mscc/mscc.h
> index 6a3d8a754eb8d..7281eea2395bd 100644
> --- a/drivers/net/phy/mscc/mscc.h
> +++ b/drivers/net/phy/mscc/mscc.h
> @@ -362,6 +362,13 @@ struct vsc85xx_hw_stat {
>  	u16 mask;
>  };
>  
> +struct vsc8531_skb {
> +	struct list_head list;
> +
> +	struct sk_buff *skb;
> +	u32 ns;
> +};

Can you map a typed structure over the skb->cb area to avoid allocating
this encapsulating structure over the sk_buff?