Re: Regression: WARNINGS and lockdep spews in 2.6.38-rc3+(bisected).

[Yong Zhang]

On Thu, Feb 03, 2011 at 11:33:04AM +0100, Peter Zijlstra wrote:
> 
> How about we revert your patch and go back to not allowing
> del_timer_sync() from any interrupt context, 

The fact is there is someone want to use del_timer_sync()
in softirq context.
My patch is inspired by this http://lkml.org/lkml/2010/8/16/291
though in the end that issue is resolved by not using
del_timer_sync() in softirq.

> we can fix __dst_free by
> removing the need for cancel_delayed_work().
> 
> Are there any other del_timer_sync() callers from softirq?

I'm not sure about this.

IMHO, we don't need to make more restriction if we don't
have to.

Thanks,
Yong
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