linux-kernel - Re: linux-next: manual merge of the devicetree tree with the powerpc tree

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Message-ID: <20210218223427.77109d83@canb.auug.org.au>
Date:   Thu, 18 Feb 2021 22:34:27 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     Rob Herring <robherring2@...il.com>,
        PowerPC <linuxppc-dev@...ts.ozlabs.org>,
        Hari Bathini <hbathini@...ux.ibm.com>,
        Lakshmi Ramasubramanian <nramas@...ux.microsoft.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Rob Herring <robh@...nel.org>
Subject: Re: linux-next: manual merge of the devicetree tree with the
 powerpc tree

Hi Michael,

On Thu, 18 Feb 2021 21:44:37 +1100 Michael Ellerman <mpe@...erman.id.au> wrote:
>
> I think it just needs this?
> 
> diff --git a/arch/powerpc/kexec/elf_64.c b/arch/powerpc/kexec/elf_64.c
> index 87e34611f93d..0492ca6003f3 100644
> --- a/arch/powerpc/kexec/elf_64.c
> +++ b/arch/powerpc/kexec/elf_64.c
> @@ -104,7 +104,7 @@ static void *elf64_load(struct kimage *image, char *kernel_buf,
>  
>  	fdt = of_kexec_alloc_and_setup_fdt(image, initrd_load_addr,
>  					   initrd_len, cmdline,
> -					   fdt_totalsize(initial_boot_params));
> +					   kexec_fdt_totalsize_ppc64(image));
>  	if (!fdt) {
>  		pr_err("Error setting up the new device tree.\n");
>  		ret = -EINVAL;
> 

I thought about that, but the last argument to
of_kexec_alloc_and_setup_fdt() is extra_fdt_size and the allocation
done is for this:

fdt_size = fdt_totalsize(initial_boot_params) +
                   (cmdline ? strlen(cmdline) : 0) +
                   FDT_EXTRA_SPACE +
                   extra_fdt_size;

and kexec_fdt_totalsize_ppc64() also includes
fdt_totalsize(initial_boot_params) so I was not sure.  Maybe
kexec_fdt_totalsize_ppc64() needs modification as well?

-- 
Cheers,
Stephen Rothwell

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