On Mon, Jan 21, 2019 at 04:43:52PM +0800, Chao Fan wrote: > Since I didn't see where Xen to fill the value, if > boot_params->acpi_rsdp_addr is filled before my code, I just need to > read it. If when I try to read it but not found, then parse RSDP and > fill the RSDP address to boot_params->acpi_rsdp_addr. And you can't simply do: if (boot_params.acpi_rsdp_addr) return; at the beginning of that function? -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply. _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec