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Date:   Thu, 27 May 2021 17:43:57 +0200
From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     Sean Christopherson <seanjc@google.com>
Cc:     Jack Wang <jack.wang.usish@gmail.com>, wanpengli@tencent.com,
        tglx@linutronix.de, stable <stable@vger.kernel.org>
Subject: Re: FAILED: patch "[PATCH] KVM: x86: Defer vtime accounting 'til
 after IRQ handling" failed to apply to 5.10-stable tree
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On Thu, May 27, 2021 at 03:25:33PM +0000, Sean Christopherson wrote:
> On Thu, May 27, 2021, Greg Kroah-Hartman wrote:
> > On Wed, May 26, 2021 at 08:08:09AM +0200, Jack Wang wrote:
> > > <gregkh@linuxfoundation.org> 于2021年5月14日周五 下午9:32写道：
> > > >
> > > >
> > > > The patch below does not apply to the 5.10-stable tree.
> > > > If someone wants it applied there, or to any other stable or longterm
> > > > tree, then please email the backport, including the original git commit
> > > > id to <stable@vger.kernel.org>.
> > > 
> > > If I first apply 866a6dadbb02 ("context_tracking: Move guest exit
> > > context tracking to separate helpers")
> > > and 88d8220bbf06 ("context_tracking: Move guest exit vtime accounting
> > > to separate helpers")
> > > 
> > > then I can apply this commit cleanly to latest 5.10.y, I suppose it
> > > will work for 5.12.
> 
> Thanks much!
> 
> > That worked, thanks!  Now queued up.
> 
> To not mess up in the future, I assume known dependencies should be tagged
> "Cc: stable...", even if the dependencies aren't technically bug fixes?

Yes, the documentation shows also how to do this semi-automatically:

    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html