netdev - Re: [PATCH net-next 1/8] net: dst: introduce dst->dev

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Message-ID: <ea8cce79-5ad5-42d2-9857-2f969f36b504@kernel.org>
Date: Thu, 28 Aug 2025 15:53:48 -0600
From: David Ahern <dsahern@...nel.org>
To: Eric Dumazet <edumazet@...gle.com>, "David S . Miller"
 <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>, Neal Cardwell <ncardwell@...gle.com>
Cc: Simon Horman <horms@...nel.org>, Kuniyuki Iwashima <kuniyu@...gle.com>,
 netdev@...r.kernel.org, eric.dumazet@...il.com
Subject: Re: [PATCH net-next 1/8] net: dst: introduce dst->dev_rcu

On 8/28/25 1:58 PM, Eric Dumazet wrote:
> Followup of commit 88fe14253e18 ("net: dst: add four helpers
> to annotate data-races around dst->dev").
> 
> We want to gradually add explicit RCU protection to dst->dev,
> including lockdep support.
> 
> Add an union to alias dst->dev_rcu and dst->dev.
> 
> Add dst_dev_net_rcu() helper.
> 
> Fixes: 4a6ce2b6f2ec ("net: introduce a new function dst_dev_put()")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> ---
>  include/net/dst.h | 16 +++++++++++-----
>  net/core/dst.c    |  2 +-
>  net/ipv4/route.c  |  4 ++--
>  3 files changed, 14 insertions(+), 8 deletions(-)
> 

Reviewed-by: David Ahern <dsahern@...nel.org>