netdev - Re: [PATCH RFC net-next v2 5/8] cadence: macb: add XDP support for gem

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Message-Id: <DFJBRX0BOZ94.1YAHY6PVCGA0L@bootlin.com>
Date: Thu, 08 Jan 2026 16:49:45 +0100
From: Théo Lebrun <theo.lebrun@...tlin.com>
To: "Paolo Valerio" <pvalerio@...hat.com>, <netdev@...r.kernel.org>
Cc: "Nicolas Ferre" <nicolas.ferre@...rochip.com>, "Claudiu Beznea"
 <claudiu.beznea@...on.dev>, "Andrew Lunn" <andrew+netdev@...n.ch>, "David
 S. Miller" <davem@...emloft.net>, "Eric Dumazet" <edumazet@...gle.com>,
 "Jakub Kicinski" <kuba@...nel.org>, "Paolo Abeni" <pabeni@...hat.com>,
 "Lorenzo Bianconi" <lorenzo@...nel.org>, Théo Lebrun
 <theo.lebrun@...tlin.com>
Subject: Re: [PATCH RFC net-next v2 5/8] cadence: macb: add XDP support for
 gem

Hello Paolo, netdev,

On Sun Dec 21, 2025 at 12:51 AM CET, Paolo Valerio wrote:
> Introduce basic XDP support for macb/gem with the XDP_PASS,
> XDP_DROP, XDP_REDIRECT verdict support.
>
> Signed-off-by: Paolo Valerio <pvalerio@...hat.com>
> ---
>  drivers/net/ethernet/cadence/macb.h      |   3 +
>  drivers/net/ethernet/cadence/macb_main.c | 184 ++++++++++++++++++++---
>  2 files changed, 169 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h
> index 45c04157f153..815d50574267 100644
> --- a/drivers/net/ethernet/cadence/macb.h
> +++ b/drivers/net/ethernet/cadence/macb.h
> @@ -16,6 +16,7 @@
>  #include <linux/workqueue.h>
>  #include <net/page_pool/helpers.h>
>  #include <net/xdp.h>
> +#include <linux/bpf_trace.h>

Shouldn't that land in macb_main.c? Required by trace_xdp_exception().

> diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
> index 582ceb728124..f767eb2e272e 100644
> --- a/drivers/net/ethernet/cadence/macb_main.c
> +++ b/drivers/net/ethernet/cadence/macb_main.c
> @@ -5,6 +5,7 @@
>   * Copyright (C) 2004-2006 Atmel Corporation
>   */
>  
> +#include <asm-generic/errno.h>

This is a mistake. For example compiling for a MIPS target I get all
errno constants redefined. Seeing where it was added it might have been
added by auto-import tooling.

If needed, to be replaced by
   #include <linux/errno.h>

⟩ git grep -h 'include.*errno' drivers/ | sort | uniq -c | sort -nr | head -n3
   1645 #include <linux/errno.h>
     19 #include <asm/errno.h>
      5 #include <linux/errno.h> /* For the -ENODEV/... values */

Thanks,

--
Théo Lebrun, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com