Re: [PATCH 08/13] PCI: Add pci_bus_extend/shrink_top()

[Yinghai Lu]

On Mon, Jan 30, 2012 at 7:50 AM, Bjorn Helgaas <bhelgaas@xxxxxxxxxx> wrote:
> On Fri, Jan 27, 2012 at 6:49 PM, Yinghai Lu <yinghai@xxxxxxxxxx> wrote:
>> extend or shrink bus and parent buses top (subordinate)
>>
>> extended range is verified safe range, and stop at recorded parent_res.
...
> This makes me nervous for the same reason as
> pci_bus_update_busn_res_end() -- we're changing res->end for resources
> already in a tree.  How do we know the tree remains consistent?
>

Yes, we already try to allocate near the top and later pad the top. So
it is safe to just adjust top.

Yinghai
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