[U-Boot] [PATCH 1/1] efi_loader: remove efi_exit_caches()

[Peter Robinson]

On Sun, Jul 21, 2019 at 8:42 PM Heinrich Schuchardt <xypron.glpk at gmx.de> wrote:
>
> On 7/21/19 11:46 AM, Peter Robinson wrote:
> >>>>> On Fri, Jul 19, 2019 at 7:28 PM Heinrich Schuchardt <xypron.glpk at gmx.de> wrote:
> >>>>>>
> >>>>>> In GRUB before 2.04 a bug existed which did not allow booting some ARM32
> >>>>>> boards if U-Boot did not disable caches, cf.
> >>>>>> https://lists.linaro.org/pipermail/cross-distro/2019-July/000933.html
> >>>>>>
> >>>>>> In ExitBootServices() we were disabling the caches by calling
> >>>>>> cleanup_before_linux(). This workaround is not needed anymore.
> >>>>>
> >>>>> Do we want to remove this straight away? A lot of distributions will
> >>>>> take time to move to grub 2.04 because it's been a long time between
> >>>>> grub releases so they'll have quite a patch delta to re-align to the
> >>>>> new release. Fedora for example will rebase to grub 2.04 in Fedora 32
> >>>>> which will start development end of August but won't be released until
> >>>>> next year.
> >>>>
> >>>> As described below this code does not remove any functionality that was
> >>>> active in U-Boot v2019.04 or v2019.07.
> >>>>
> >>>> I can see nothing in https://fedoraproject.org/wiki/Updates_Policy
> >>>> stopping GRUB 2.04 from being made available for stable Fedora releases.
> >>>
> >>> The maintainers believe that it's too intrusive to land now and they
> >>> want maximum testing time before it gets to stable users, funnily
> >>> enough people don't like it when their machines cease to boot.
> >>
> >> Why should anybody's machines cease to boot?
> >>
> >> If Fedora does not role out a new U-Boot they are fine. If Fedora roles
> >> out a new U-Boot they should role out a matching GRUB and they are fine too.
> >>
> >> The venturous who build their own U-Boot should know how to role back
> >> their system if needed.
> >
> > You've clearly never maintained a distribution across 1000s of device
> > types and 100s of thousands of users.
> >
> > We will be shipping Fedora 31 with U-Boot 2019.10 and the current
> > version of grub that the maintainers wish to support, if that requires
>
> You do not give any clue which version of GRUB will be shipped with
> Fedora 31. Could you, please, clarify this. A link to the Fedora repo
> would be helpful. Thanks.

It's 2.02 and a whole of lot of patches, like the rest of the world
seems to ship. The git repo is here:
https://github.com/rhboot/grub2/tree/fedora-31