Re: [PATCH 2/2] lockdep: check that no locks held at freeze time

[Pavel Machek]

1;2403;0cOn Mon 2013-05-06 10:55:47, Peter Zijlstra wrote:
> On Sun, May 05, 2013 at 11:18:44AM +0200, Ingo Molnar wrote:
> > That's the old 32-bit x86 trick to compute 'current' from the kernel stack 
> > pointer.
> > 
> > It can be done better - for example on platforms with optimized percpu 
> > variables (x86-64) it looks like this:
> 
> Doesn't i386 have all the funny per-cpu stuff too? So the only reason it still
> does the fugly stack based thing is because nobody could be arsed to do the
> work of converting it.

(Note that the quoted example was from ARM. But also note that the
percpu stuff requires memory access, so...)
									Pavel
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