netdev - Re: [PATCH net-next 1/9] netdevsim: a basic test PSP implementation

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Message-ID: <20250924171241.189938a6@kernel.org>
Date: Wed, 24 Sep 2025 17:12:41 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Daniel Zahka <daniel.zahka@...il.com>
Cc: Andrew Lunn <andrew+netdev@...n.ch>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Paolo Abeni
 <pabeni@...hat.com>, Simon Horman <horms@...nel.org>, Shuah Khan
 <shuah@...nel.org>, Willem de Bruijn <willemb@...gle.com>, Breno Leitao
 <leitao@...ian.org>, Petr Machata <petrm@...dia.com>, Yuyang Huang
 <yuyanghuang@...gle.com>, Xiao Liang <shaw.leon@...il.com>, Carolina Jubran
 <cjubran@...dia.com>, Donald Hunter <donald.hunter@...il.com>,
 netdev@...r.kernel.org
Subject: Re: [PATCH net-next 1/9] netdevsim: a basic test PSP implementation

On Wed, 24 Sep 2025 12:49:47 -0700 Daniel Zahka wrote:
> +	if (psp_ext)
> +		__skb_ext_set(skb, SKB_EXT_PSP, psp_ext);

Oops, the extension is not defined if the CONFIG is not set:

drivers/net/netdevsim/netdev.c: In function ‘nsim_forward_skb’:
drivers/net/netdevsim/netdev.c:116:36: error: ‘SKB_EXT_PSP’ undeclared (first use in this function); did you mean ‘SKB_EXT_NUM’?
  116 |                 __skb_ext_set(skb, SKB_EXT_PSP, psp_ext);
      |                                    ^~~~~~~~~~~
      |                                    SKB_EXT_NUM
-- 
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