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Subject: Re: [PATCH] Assume we're on cpu 0 in early boot
From: Michael Ellerman <michael@ellerman.id.au>
To: Paul Mackerras <paulus@samba.org>
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Date: Wed, 28 Jun 2006 12:11:20 +1000
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On Wed, 2006-06-28 at 11:42 +1000, Paul Mackerras wrote:
> Michael Ellerman writes:
>=20
> > There's a small period early in boot where we don't know which cpu we'r=
e
> > running on. That's ok, except that it means we have no paca, or more
> > correctly that our paca pointer points somewhere random.
> >=20
> > So that we can safely call things like smp_processor_id(), we need a pa=
ca,
> > so just assume we're on cpu 0. No code should _write_ to the paca befor=
e
> > we've set the correct one up.
>=20
> OK, but why not just do a setup_paca(0) at the start of early_setup(),
> in C code?  You can also remove the redundant paca setting in
> start_here_common() in head_64.S.

Yep, duh. New patch RSN.

cheers

--=20
Michael Ellerman
IBM OzLabs

wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)

We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person

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