netdev - Re: [PATCH net V1] net/ipv4: Use proper RCU APIs for writer-side in udp

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Message-ID: <1391366975.28432.89.camel@edumazet-glaptop2.roam.corp.google.com>
Date:	Sun, 02 Feb 2014 10:49:35 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Or Gerlitz <ogerlitz@...lanox.com>
Cc:	davem@...emloft.net, netdev@...r.kernel.org,
	Shlomo Pongratz <shlomop@...lanox.com>,
	Eric Dumazet <edumazet@...gle.com>
Subject: Re: [PATCH net V1] net/ipv4: Use proper RCU APIs for writer-side in
 udp_offload.c

On Sun, 2014-02-02 at 15:42 +0200, Or Gerlitz wrote:
> From: Shlomo Pongratz <shlomop@...lanox.com>
> 
> RCU writer side should use rcu_dereference_protected() and not
> rcu_dereference(), fix that. This also removes the "suspicious RCU usage"
> warning seen when running with CONFIG_PROVE_RCU.
> 
> Also, don't use rcu_assign_pointer/rcu_dereference for pointers
> which are invisible beyond the udp offload code.
> 
> Fixes: b582ef0 ('net: Add GRO support for UDP encapsulating protocols')
> Reported-by: Eric Dumazet <edumazet@...gle.com>
> Cc: Eric Dumazet <edumazet@...gle.com>
> Signed-off-by: Or Gerlitz <ogerlitz@...lanox.com>
> Signed-off-by: Shlomo Pongratz <shlomop@...lanox.com>
> ---

Acked-by: Eric Dumazet <edumazet@...gle.com>


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