[Click] NotifierQueue on multi-threaded Click problem.

[Joonwoo Park]

In addition about softirq.

> > - "The spinlock_bh needed because of push and pull can be called
> > concurrently from softirq." : What do you mean?  I may be being stupid,
> > but I don't think ANY pushes and pulls should be called from softirq
> > context.  What softirq context are you thinking of?  Click runs almost
> > entirely in user context (i.e. the kernel threads), or at least it should.

The ToDevice::run_task() is runs in sofrtirq context and it pulls packet.
You may get warning WARN_ON(in_softirq()) at that function.
Isn't it OK?

Jason Park (Joonwoo Park)