Re: [Stable-5.4][PATCH 0/3] arm64: Allow the compat vdso to be disabled at runtime

[Marc Zyngier]

Hi Greg,

On 2020-07-16 12:58, Greg KH wrote:
> On Wed, Jul 15, 2020 at 01:56:11PM +0100, Marc Zyngier wrote:
> > This is a backport of the series that recently went into 5.8. Note
> > that the first patch is more a complete rewriting than a backport, as
> > the vdso implementation in 5.4 doesn't have much in common with
> > mainline. This affects the 32bit arch code in a benign way.
> >
> > It has seen very little testing, as I don't have the HW that triggers
> > this issue. I have run it in VMs by faking the CPU MIDR, and nothing
> > caught fire. Famous last words.
>
> These are also needed in 5.7.y, right?  If so, I need that series 
> before
> I can take this one as we don't want people moving to a newer kernel 
> and
> suffer regressions :(

The original mainline changes:

4b661d6133c5 arm64: arch_timer: Disable the compat vdso for cores 
affected by ARM64_WORKAROUND_1418040
c1fbec4ac0d7 arm64: arch_timer: Allow an workaround descriptor to 
disable compat vdso
97884ca8c292 arm64: Introduce a way to disable the 32bit vdso

do apply cleanly to stable-5.7. Do you want me to resend them 
separately,
or will you pick the patches directly from mainline?

Thanks,

        M.
--
Jazz is not dead. It just smells funny...