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

[Youling Tang]

Hi, Ruoyao

On 09/22/2022 06:00 PM, Xi Ruoyao wrote:
> 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...

This is because of the problem after efistub removes the fdt
modification, I will reimplement kexec/kdump. This build error can be
avoided by turning off CONFIG_KEXEC temporarily, tomorrow I will submit
a new kexec/kdump implementation.

Thanks,
Youling.
>