diff --git a/drivers/acpi/acpica/actables.h b/drivers/acpi/acpica/actables.h
index 917315ec21dda3f272e88ca61fcb5b845aa31457..c54f42c64fe2ca78ae7d9269b96c69ad2461c552 100644
--- a/drivers/acpi/acpica/actables.h
+++ b/drivers/acpi/acpica/actables.h
@@ -49,6 +49,8 @@ acpi_status acpi_allocate_root_table(u32 initial_table_count);
 /*
  * tbxfroot - Root pointer utilities
  */
+acpi_status acpi_tb_validate_rsdp(struct acpi_table_rsdp *rsdp);
+
 u8 *acpi_tb_scan_memory_for_rsdp(u8 *start_address, u32 length);
 
 /*
diff --git a/drivers/acpi/acpica/tbxfroot.c b/drivers/acpi/acpica/tbxfroot.c
index e76ed0f078265becd5942fc70ac2e21b85d013fa..948c95e80d44765f41e82bb62c92bb4c3405bb01 100644
--- a/drivers/acpi/acpica/tbxfroot.c
+++ b/drivers/acpi/acpica/tbxfroot.c
@@ -48,9 +48,6 @@
 #define _COMPONENT          ACPI_TABLES
 ACPI_MODULE_NAME("tbxfroot")
 
-/* Local prototypes */
-static acpi_status acpi_tb_validate_rsdp(struct acpi_table_rsdp *rsdp);
-
 /*******************************************************************************
  *
  * FUNCTION:    acpi_tb_validate_rsdp
@@ -62,8 +59,7 @@ static acpi_status acpi_tb_validate_rsdp(struct acpi_table_rsdp *rsdp);
  * DESCRIPTION: Validate the RSDP (ptr)
  *
  ******************************************************************************/
-
-static acpi_status acpi_tb_validate_rsdp(struct acpi_table_rsdp *rsdp)
+acpi_status acpi_tb_validate_rsdp(struct acpi_table_rsdp *rsdp)
 {
 
 	/*
@@ -72,7 +68,7 @@ static acpi_status acpi_tb_validate_rsdp(struct acpi_table_rsdp *rsdp)
 	 * Note: Sometimes there exists more than one RSDP in memory; the valid
 	 * RSDP has a valid checksum, all others have an invalid checksum.
 	 */
-	if (ACPI_STRNCMP((char *)rsdp, ACPI_SIG_RSDP,
+	if (ACPI_STRNCMP((char *)rsdp->signature, ACPI_SIG_RSDP,
 			 sizeof(ACPI_SIG_RSDP) - 1) != 0) {
 
 		/* Nope, BAD Signature */