linux-kernel - Re: sparc boot failure due to perf init

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Date:	Thu, 13 Jan 2011 13:25:05 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	David Miller <davem@...emloft.net>, linux-kernel@...r.kernel.org,
	sparclinux@...r.kernel.org
Subject: Re: sparc boot failure due to perf init

> >  }
> >  
> > -arch_initcall(pcr_arch_init);
> > +early_initcall(pcr_arch_init);
> 
> 
> I just realized, doesn't this make bootability depend on link order?
Yes.

> Since both the pmu init and its dependencies are now early_initcall()
> how do we guarantee pcr_arch_init() and cpu_type_probe() are in fact
> called _before_ init_hw_perf_events()?

Today this is achieved by perf_event.o being located last
in the Makefile in arch/sparc/kernel/

It deserves a comment..

	Sam
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