From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Mon, 30 May 2005 22:50:15 +0000 (-0700)
Subject: [IPV4]: Fix BUG() in 2.6.x, udp_poll(), fragments + CONFIG_HIGHMEM
X-Git-Tag: v2.6.12-rc6~33^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=208d89843b7b03978d8e748b8b991c1be81c4f43;p=pandora-kernel.git

[IPV4]: Fix BUG() in 2.6.x, udp_poll(), fragments + CONFIG_HIGHMEM

Steven Hand <Steven.Hand@cl.cam.ac.uk> wrote:
>
> Reconstructed forward trace:
>
>   net/ipv4/udp.c:1334   spin_lock_irq()
>   net/ipv4/udp.c:1336   udp_checksum_complete()
> net/core/skbuff.c:1069   skb_shinfo(skb)->nr_frags > 1
> net/core/skbuff.c:1086   kunmap_skb_frag()
> net/core/skbuff.h:1087   local_bh_enable()
> kernel/softirq.c:0140   WARN_ON(irqs_disabled());

The receive queue lock is never taken in IRQs (and should never be) so
we can simply substitute bh for irq.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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