On Mon, Dec 29, 2008 at 11:02:07AM +0100, Peter Zijlstra wrote:

Subject: net: fix tcp deadlock

Lockdep spotted that the percpu counter op takes a lock so that softirq
recursion deadlocks can occur. Delay the op until we've disabled
softirqs to avoid this.

Signed-off-by: Peter Zijlstra <redacted>

You also need to patch the other places where we use that percpu
counter from process context, e.g., for /proc/net/tcp.

Thanks,
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