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SubjectRe: [PATCH 4.9 23/35] x86/mm: Expand static page table for fixmap space
Hi Ben,

On Thu, Nov 01, 2018 at 10:25:43PM +0000, Ben Hutchings wrote:
> On Thu, 2018-10-11 at 17:35 +0200, Greg Kroah-Hartman wrote:
> > 4.9-stable review patch. If anyone has any objections, please let me know.
> >
> > ------------------
> >
> > From: Feng Tang <feng.tang@intel.com>
> >
> > commit 05ab1d8a4b36ee912b7087c6da127439ed0a903e upstream.
>
> This backport is incorrect. The part that updated __startup_64() in
> arch/x86/kernel/head64.c was dropped, presumably because that function
> doesn't exist in 4.9. However that seems to be an essential of the
> fix. In 4.9 the startup_64 routine in arch/x86/kernel/head_64.S would
> need to be changed instead.
>
> I also found that this introduces new boot-time warnings on some
> systems if CONFIG_DEBUG_WX is enabled.
>
> So, unless someone provides fixes for those issues, I think this should
> be reverted for the 4.9 branch.

Thanks for the catch, I'm fine with the revert for now.

- Feng

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