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Date:	Mon, 30 Apr 2012 17:34:45 -0700
From:	Yinghai Lu <>
To:	Bjorn Helgaas <>
Cc:	Jesse Barnes <>,
	Benjamin Herrenschmidt <>,
	Tony Luck <>,
	David Miller <>, x86 <>,
	Dominik Brodowski <>,
	Andrew Morton <>,
	Linus Torvalds <>,
	Greg Kroah-Hartman <>,,,
Subject: Re: [PATCH -v11 05/30] PCI: Add busn_res operation functions

On Mon, Apr 30, 2012 at 4:29 PM, Bjorn Helgaas <> wrote:
> On Sun, Mar 18, 2012 at 11:42 PM, Yinghai Lu <> wrote:
>> +void pci_bus_update_busn_res_end(struct pci_bus *b, int bus_max)
>> +{
>> +       struct resource *res = &b->busn_res;
>> +       struct resource old_res = *res;
>> +
>> +       res->end = bus_max;
> I've mentioned before that I'm not comfortable with updating the
> struct resource after it's been inserted into the tree.  If you want
> to do an in-place update, I think you need to add a new interface in
> kernel/resource.c so it can make sure the resource tree remains
> consistent.

ok, will add one function in kernel/resource.c to make sure that end
could be updated safely
by checking parent and children.
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