Re: [tip: x86/urgent] x86/boot: Pull up cmdline preparation and early param parsing

[Patrick J. Volkerding]

On Fri, Dec 10, 2021 at 5:28 AM Borislav Petkov <bp@xxxxxxxxx> wrote:
>
> On Thu, Dec 09, 2021 at 05:37:42PM +0100, Borislav Petkov wrote:
> > Whatever we do, it needs to be tested by all folks on Cc who already
> > reported regressions, i.e., Anjaneya, Hugh, John and Patrick.
>
> Ok, Mike is busy so here are some patches for testing:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/bp/bp.git/log/?h=rc4-boot
>
> I'd appreciate it if folks who reported an issue, verify those.
>
> The first two are reverts which should address the issues with mem=
> folks have reported. And the last one should address Anjaneya's issue.

I applied the two revert patches to 5.15.7 (the last one won't apply
so I skipped it) and the resulting x86 32-bit kernel boots fine here
on the Thinkpad X1E that was having issues previously.

Then I tested an unpatched 5.16-rc4, which (as expected) got the boot
hang on the affected machine. Applied the three patches, and the
resulting kernel boots fine.

Take care,

Pat