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

[Heinrich Schuchardt]

On 7/20/19 12:22 PM, Peter Robinson wrote:
>> On 7/19/19 9:06 PM, 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.

Best regards

Heinrich