netdev - Re: [NET]: Handle disabled preemption in gfp

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Message-Id: <20070227.095657.106265863.davem@davemloft.net>
Date:	Tue, 27 Feb 2007 09:56:57 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	kaber@...sh.net
Cc:	netdev@...r.kernel.org
Subject: Re: [NET]: Handle disabled preemption in gfp_any()

From: Patrick McHardy <kaber@...sh.net>
Date: Tue, 27 Feb 2007 18:48:19 +0100

> [NET]: Handle disabled preemption in gfp_any()
> 
> ctnetlink uses netlink_unicast from an atomic_notifier_chain
> (which is called within a RCU read side critical section)
> without holding further locks. netlink_unicast calls netlink_trim
> with the result of gfp_any() for the gfp flags, which are passed
> down to pskb_expand_header. gfp_any() only checks for softirq
> context and returns GFP_KERNEL, resulting in this warning:
> 
> BUG: sleeping function called from invalid context at mm/slab.c:3032
> in_atomic():1, irqs_disabled():0
> no locks held by rmmod/7010.

Applied, good catch Patrick.
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