netdev - Re: [PATCH net-next] net: netlink: reduce extack cookie size

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Message-ID: <20250516163709.5cbd66bc@kernel.org>
Date: Fri, 16 May 2025 16:37:09 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Johannes Berg <johannes@...solutions.net>
Cc: linux-wireless@...r.kernel.org, netdev@...r.kernel.org, Johannes Berg
 <johannes.berg@...el.com>
Subject: Re: [PATCH net-next] net: netlink: reduce extack cookie size

On Fri, 16 May 2025 13:59:27 +0200 Johannes Berg wrote:
> From: Johannes Berg <johannes.berg@...el.com>
> 
> Seems like the extack cookie hasn't found any users outside
> of wireless, which always uses nl_set_extack_cookie_u64().
> Thus, allocating 20 bytes for it is pointless, reduce that
> to 8 bytes, and add a BUILD_BUG_ON() to ensure it's enough
> (obviously it is, for a u64, but in case it changes again.)

Reviewed-by: Jakub Kicinski <kuba@...nel.org>