Re: [PATCH 1/1] x86: don't exclude low BIOS area when allocating address space for non-PCI cards

[Bjorn Helgaas]

On Wed, Jul 16, 2014 at 1:35 PM, Christoph Schulz <develop@xxxxxxxxxx> wrote:
> Hello!
>
> Bjorn Helgaas schrieb am Wed, 16 Jul 2014 13:00:21 -0600:
>
>
>> I applied this to pci/misc for v3.17, thanks.
>
>
> Thank you very much. What do you think about queuing it up to -stable?
> Commit 30919b0bf356 is in the tree since 2.6.37-rc7. We have used the
> proposed patch for over a year (since 3.2.42 / 3.7.10 / 3.8.5, to be exact)
> without any regressions. I *think* it meets the criteria for -stable, but I
> don't have much experience of Linux kernel development processes, so it's
> your decision, of course.

Good point, I added:

CC: stable@xxxxxxxxxxxxxxx  # v2.6.37+

>> This effectively reverts 30919b0bf356 ("x86: avoid low BIOS area when
>> allocating address space").  I don't see a reference there to a bug
>> fixed by 30919b0bf356, so hopefully reverting it won't reintroduce a
>> bug.
>
>
> Well, for PCI, the current behaviour does not change effectively, and for
> ISA, the proposed patch fixes a bug. What memory allocations beyond ISA and
> PCI could be adversely affected?

There aren't very many, I guess, but I don't want to build things on
the assumption that ISA and PCI are the only possibilities.  ISA was
once the only possibility :)

Bjorn
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