netdev - Re: [PATCH] udp: ipv4: do not use sk_dst

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Message-Id: <20131217.145116.186884795918524348.davem@davemloft.net>
Date:	Tue, 17 Dec 2013 14:51:16 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org, fengguang.wu@...el.com
Subject: Re: [PATCH] udp: ipv4: do not use sk_dst_lock from softirq context

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Sun, 15 Dec 2013 10:53:46 -0800

> From: Eric Dumazet <edumazet@...gle.com>
> 
> Using sk_dst_lock from softirq context is not supported right now.
> 
> Instead of adding BH protection everywhere,
> udp_sk_rx_dst_set() can instead use xchg(), as suggested
> by David.
> 
> Reported-by: Fengguang Wu <fengguang.wu@...el.com>
> Fixes: 975022310233 ("udp: ipv4: must add synchronization in udp_sk_rx_dst_set()")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>

Applied, thanks Eric.
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