linux-kernel - Re: [PATCH v2] powerpc: don't enable cpu hotplug on mpic-based pseries

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Date:	Thu, 11 Oct 2007 00:59:41 -0500
From:	Olof Johansson <olof@...om.net>
To:	Paul Mackerras <paulus@...ba.org>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>, Greg KH <greg@...ah.com>,
	Greg KH <gregkh@...e.de>, linux-kernel@...r.kernel.org,
	Chris Wedgwood <reviews@...cw.f00f.org>,
	linuxppc-dev@...abs.org, tgall.foo@...il.com,
	Thomas Gleixner <tglx@...utronix.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	stable@...nel.org
Subject: Re: [PATCH v2] powerpc: don't enable cpu hotplug on mpic-based
	pseries

On Thu, Oct 11, 2007 at 03:52:04PM +1000, Paul Mackerras wrote:
> Olof Johansson writes:
> 
> > Don't allow cpu hotplug on systems lacking XICS interrupt controller,
> > since current code is hardcoded for it.
> ...
> > +	for (np = NULL; (np = of_find_node_by_name(np,
> > +						   "interrupt-controller"));) {
> 
> Looks like for_each_node_by_name would be nicer here.
> 
> If you agree, I'll hand-edit your patch to do that and apply it.

Go for it, I just stole that out of the detection code. That
could be changed accordingly as well at some point (I'm guessing
for_each_node_by_name didn't exist when that was written).

> Of course, ultimately we should implement the necessary mpic bits to
> support cpu hotplug.

Yep. I'll leave that to people who have hardware access. :-)


Thanks,

-Olof
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