linux-kernel - Re: [PATCH v2] powerpc/kexec_file: Restore FDT size estimation for kdump kernel

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Date:   Tue, 9 Mar 2021 20:09:25 -0700
From:   Rob Herring <robh@...nel.org>
To:     Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>
Cc:     Thiago Jung Bauermann <bauerman@...ux.ibm.com>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        kexec@...ts.infradead.org, Hari Bathini <hbathini@...ux.ibm.com>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] powerpc/kexec_file: Restore FDT size estimation for
 kdump kernel

On Tue, Mar 9, 2021 at 7:31 PM Lakshmi Ramasubramanian
<nramas@...ux.microsoft.com> wrote:
>
> On 3/9/21 6:08 PM, Rob Herring wrote:
>
> Hi Rob,
>
> > On Fri, Feb 19, 2021 at 6:52 PM Thiago Jung Bauermann
> > <bauerman@...ux.ibm.com> wrote:
> >>
> >> Commit 2377c92e37fe ("powerpc/kexec_file: fix FDT size estimation for kdump
> >> kernel") fixed how elf64_load() estimates the FDT size needed by the
> >> crashdump kernel.
> >>
> >> At the same time, commit 130b2d59cec0 ("powerpc: Use common
> >> of_kexec_alloc_and_setup_fdt()") changed the same code to use the generic
> >> function of_kexec_alloc_and_setup_fdt() to calculate the FDT size. That
> >> change made the code overestimate it a bit by counting twice the space
> >> required for the kernel command line and /chosen properties.
> >>
> >> Therefore change kexec_fdt_totalsize_ppc64() to calculate just the extra
> >> space needed by the kdump kernel, and change the function name so that it
> >> better reflects what the function is now doing.
> >>
> >> Signed-off-by: Thiago Jung Bauermann <bauerman@...ux.ibm.com>
> >> Reviewed-by: Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>
> >> ---
> >>   arch/powerpc/include/asm/kexec.h  |  2 +-
> >>   arch/powerpc/kexec/elf_64.c       |  2 +-
> >>   arch/powerpc/kexec/file_load_64.c | 26 ++++++++------------------
> >>   3 files changed, 10 insertions(+), 20 deletions(-)
> >
> > I ended up delaying the referenced series til 5.13, but have applied
> > it now. Can I get an ack from the powerpc maintainers on this one?
> > I'll fixup the commit log to make sense given the commit id's aren't
> > valid.
>
> I checked the change applied in linux-next branch and also Device Tree's
> for-next branch - it looks like v1 of Thiago's patch has been applied.
> Could you please pick up the v2 patch?

Huh? This patch (v2) hasn't been applied to any tree AFAICT.

Rob