Re: [PATCH 2/2] Rewrite jump_label.c to use binary search

[Mathieu Desnoyers <compudj@krystal.dyndns.org>]

* Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca) wrote:
> * Andi Kleen (andi@firstfloor.org) wrote:
> > 
> > >
> > >>> +	for (; entry < stop && entry->key == key; entry++)
> > >>> +		if (kernel_text_address(entry->code))
> > >>
> > >> This does not work for modules I'm afraid, only for the core kernel. You
> > >> should test for __module_text_address() somewhere.
> > >
> > > I thought it was shared now, but ok.
> > 
> > Double checked. This is ok because kernel_text_address()
> > already checks for modules. You were probably thinking
> > of __kernel_text_address()
> 
> Ah right,
> 
> Although we have another problem:
> 
> __module_text_address() includes module init text, which defeats the
> purpose of the check put in there by Jason.
> 
> So the check works for the core kernel, but not for modules.

So, we have this issue, but I also have a question for Jason: what
happens if someone puts static jump in a function declared in the __init
section of the core kernel/module ? Can we enable them at early boot ?

Thanks,

Mathieu

> 
> Mathieu
> 
> > 
> > -Andi
> > 
> 
> -- 
> Mathieu Desnoyers
> Operating System Efficiency R&D Consultant
> EfficiOS Inc.
> http://www.efficios.com

-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com