linux-kernel - Re: linux-next: manual merge of the tip tree with the efi-fixes tree

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Message-ID: <CAMj1kXGvDozDhomY17UoTKbf+yWvxdsAhCGXYoV+m3q0rjjM-w@mail.gmail.com>
Date:   Thu, 19 Oct 2023 09:01:47 +0200
From:   Ard Biesheuvel <ardb@...nel.org>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: manual merge of the tip tree with the efi-fixes tree

On Thu, 19 Oct 2023 at 06:19, Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>
> Hi all,
>
> On Thu, 19 Oct 2023 14:54:04 +1100 Stephen Rothwell <sfr@...b.auug.org.au> wrote:
> >
> > Today's linux-next merge of the tip tree got a conflict in:
> >
> >   drivers/firmware/efi/libstub/x86-stub.c
> >
> > between commit:
> >
> >   db7724134c26 ("x86/boot: efistub: Assign global boot_params variable")
> >
> > from the efi-fixes tree and commit:
> >
> >   50dcc2e0d62e ("x86/boot: efistub: Assign global boot_params variable")
> >
> > from the tip tree.
> >
> > I fixed it up (I just arbitrarily chose the former) and can carry the
> > fix as necessary. This is now fixed as far as linux-next is concerned,
> > but any non trivial conflicts should be mentioned to your upstream
> > maintainer when your tree is submitted for merging.  You may also want
> > to consider cooperating with the maintainer of the conflicting tree to
> > minimise any particularly complex conflicts.
>
> Well, that didn't work :-(
>
> I ave used the latter version (i.e. the tip tree one) this time.
>

Apologies, I should have updated or reverted the efi-fixes one but I
still need to find a way to deal with this issue on the fixes branch
too.

Note that the hunk below needs to be dropped or the build will fail.



--- a/drivers/firmware/efi/libstub/x86-stub.h
+++ b/drivers/firmware/efi/libstub/x86-stub.h
@@ -2,6 +2,8 @@

 #include <linux/efi.h>

+extern struct boot_params *boot_params_pointer asm("boot_params");
+
 extern void trampoline_32bit_src(void *, bool);
 extern const u16 trampoline_ljmp_imm_offset;