> +void __init ms_hyperv_late_init(void)
> +{
> + struct acpi_table_header *header;
> + acpi_status status;
> + u8 *randomdata;
> + u32 length, i;
> +
> + /*
> + * Seed the Linux random number generator with entropy provided by
> + * the Hyper-V host in ACPI table OEM0. It would be nice to do this
> + * even earlier in ms_hyperv_init_platform(), but the ACPI subsystem
> + * isn't set up at that point. Skip if booted via EFI as generic EFI
> + * code has already done some seeding using the EFI RNG protocol.
> + */
> + if (!IS_ENABLED(CONFIG_ACPI) || efi_enabled(EFI_BOOT))
> + return;
> +
> + status = acpi_get_table("OEM0", 0, &header);
> + if (ACPI_FAILURE(status) || !header)
> + return;
Should we call acpi_put_table() if header == 0? It will also be helpful doing a
pr_info() here so user knows that hyper-v random number is not used.
