linux-kernel - Re: [patch 09/16] powerpc: Replace old style lock initializer

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Message-Id: <20091108185539.8d09017e.sfr@canb.auug.org.au>
Date:	Sun, 8 Nov 2009 18:55:39 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>, linuxppc-dev@...abs.org,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [patch 09/16] powerpc: Replace old style lock initializer

Hi Ben,

On Sat, 07 Nov 2009 09:55:44 +1100 Benjamin Herrenschmidt <benh@...nel.crashing.org> wrote:
>
> Looks reasonable. But iseries can be a bitch, so we do need to test it
> on monday.

It should be safe as the spinlocks cannot be access until after the
following ppc_md pointer initialisations are done (and all this happens
before the secondary CPUs are started).

But, you are right that there is nothing like actually testing with
iSeries. :-)

> >  void __init hpte_init_iSeries(void)
> >  {
> > +	int i;
> > +
> > +	for (i = 0; i < ARRAY_SIZE(iSeries_hlocks); i++)
> > +		spin_lock_init(&iSeries_hlocks[i]);
> > +
> >  	ppc_md.hpte_invalidate	= iSeries_hpte_invalidate;
> >  	ppc_md.hpte_updatepp	= iSeries_hpte_updatepp;
> >  	ppc_md.hpte_updateboltedpp = iSeries_hpte_updateboltedpp;

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au
http://www.canb.auug.org.au/~sfr/

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