From: Josh Boyer <[email protected]> This option allows userspace to pass the RSDP address to the kernel, which makes it possible for a user to modify the workings of hardware . Reject the option when the kernel is locked down.
Signed-off-by: Josh Boyer <[email protected]> Signed-off-by: David Howells <[email protected]> Reviewed-by: "Lee, Chun-Yi" <[email protected]> cc: Dave Young <[email protected]> cc: [email protected] --- drivers/acpi/osl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index db78d353bab1..36c6527c1b0a 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -192,7 +192,7 @@ acpi_physical_address __init acpi_os_get_root_pointer(void) acpi_physical_address pa = 0; #ifdef CONFIG_KEXEC - if (acpi_rsdp) + if (acpi_rsdp && !kernel_is_locked_down("ACPI RSDP specification")) return acpi_rsdp; #endif
