Re: Patch "x86/hyperv: Make vapic support x2apic mode" has been added to the 4.19-stable tree

["gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>]

On Sun, Oct 27, 2019 at 05:35:00PM +0000, Michael Kelley wrote:
> From: gregkh@linuxfoundation.org <gregkh@linuxfoundation.org>
> > 
> > This is a note to let you know that I've just added the patch titled
> > 
> >     x86/hyperv: Make vapic support x2apic mode
> > 
> > to the 4.19-stable tree which can be found at:
> > 
> > https://git.kernel.org/pub/scm/linux/kernel/git/stable/stable-queue.git
> > 
> > The filename of the patch is:
> >      x86-hyperv-make-vapic-support-x2apic-mode.patch
> > and it can be found in the queue-4.19 subdirectory.
> > 
> > If you, or anyone else, feels it should not be added to the stable tree,
> > please let <stable@vger.kernel.org> know about it.
> > 
> > 
> > From e211288b72f15259da86eed6eca680758dbe9e74 Mon Sep 17 00:00:00 2001
> > From: Roman Kagan <rkagan@virtuozzo.com>
> > Date: Thu, 10 Oct 2019 12:33:05 +0000
> > Subject: x86/hyperv: Make vapic support x2apic mode
> > 
> > From: Roman Kagan <rkagan@virtuozzo.com>
> > 
> > commit e211288b72f15259da86eed6eca680758dbe9e74 upstream.
> > 
> > Now that there's Hyper-V IOMMU driver, Linux can switch to x2apic mode
> > when supported by the vcpus.
> > 
> 
> This patch should not go back to the 4.19 stable tree.  I don't think it will
> break anything, but there's no Hyper-V vIOMMU driver in 4.19 so
> x2apic_enabled() is never true.

Thanks for letting me know, now dropped.

greg k-h