Hi,
Michael Ellerman wrote:
> The non-zero return from the prepare callback is returned by sys_kexec_load()
> to userspace, indicating that kexec is not supported on the machine.
...
> @@ -638,6 +639,13 @@ static int __init iseries_probe(void)
> return 1;
> }
>
> +#ifdef CONFIG_KEXEC
> +static int iseries_kexec_prepare(struct kimage *image)
> +{
> + return -ENOSYS;
> +}
> +#endif
> +
> define_machine(iseries) {
> .name = "iSeries",
> .setup_arch = iSeries_setup_arch,
> @@ -658,6 +666,9 @@ define_machine(iseries) {
> .probe = iseries_probe,
> .ioremap = iseries_ioremap,
> .iounmap = iseries_iounmap,
> +#ifdef CONFIG_KEXEC
> + .machine_kexec_prepare = iseries_kexec_prepare,
> +#endif
> /* XXX Implement enable_pmcs for iSeries */
> };
But machine_kexec_prepare() already returns -ENOSYS if the platform
doesn't have the hook in ppc_md. I must be missing something; what is
this patch fixing?
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