linux-kernel - Re: [PATCH v3 1/3] LoongArch: Add kexec support

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Date:   Thu, 22 Sep 2022 18:00:09 +0800
From:   Xi Ruoyao <xry111@...111.site>
To:     Youling Tang <tangyouling@...ngson.cn>,
        Huacai Chen <chenhuacai@...nel.org>,
        Baoquan He <bhe@...hat.com>,
        Eric Biederman <ebiederm@...ssion.com>
Cc:     WANG Xuerui <kernel@...0n.name>, Vivek Goyal <vgoyal@...hat.com>,
        Dave Young <dyoung@...hat.com>, Guo Ren <guoren@...nel.org>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        kexec@...ts.infradead.org, loongarch@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/3] LoongArch: Add kexec support

On Thu, 2022-09-15 at 10:53 +0800, Youling Tang wrote:
> +int machine_kexec_prepare(struct kimage *kimage)
> +{
> +       int i;
> +       void *dtb = (void *)KEXEC_BLOB_ADDR;
> +
> +       kexec_image_info(kimage);
> +
> +       /* Find the Flattened Device Tree */
> +       for (i = 0; i < kimage->nr_segments; i++) {
> +               if (!fdt_check_header(kimage->segment[i].buf)) {

Hi Youling,

When I build Huacai's tree
(https://github.com/loongson/linux/commits/loongarch-next), there is a
strange error linking vmlinux:

ld: arch/loongarch/kernel/machine_kexec.o: in function `machine_kexec_prepare':
/home/xry111/git-repos/linux/arch/loongarch/kernel/machine_kexec.c:70: undefined reference to `fdt_check_header'

Not sure why...

-- 
Xi Ruoyao <xry111@...111.site>
School of Aerospace Science and Technology, Xidian University