ACPI / ia64: introduce variable acpi_lapic into ia64

This variable was defined and assigned in x86, is used to indicate
whether LAPIC exists in MADT. Now introduce it into ia64 to help
make correct judgment when get information for ACPI processor later.

Signed-off-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

arch/ia64/include/asm/acpi.h

@@ -85,6 +85,7 @@ ia64_acpi_release_global_lock (unsigned int *lock)
 	((Acq) = ia64_acpi_release_global_lock(&facs->global_lock))
 
 #ifdef	CONFIG_ACPI
+extern int acpi_lapic;
 #define acpi_disabled 0	/* ACPI always enabled on IA64 */
 #define acpi_noirq 0	/* ACPI always enabled on IA64 */
 #define acpi_pci_disabled 0 /* ACPI PCI always enabled on IA64 */

arch/ia64/kernel/acpi.c

@@ -56,6 +56,7 @@
 
 #define PREFIX			"ACPI: "
 
+int acpi_lapic;
 unsigned int acpi_cpei_override;
 unsigned int acpi_cpei_phys_cpuid;
 
@@ -676,6 +677,8 @@ int __init early_acpi_boot_init(void)
 	if (ret < 1)
 		printk(KERN_ERR PREFIX
 		       "Error parsing MADT - no LAPIC entries\n");
+	else
+		acpi_lapic = 1;
 
 #ifdef CONFIG_SMP
 	if (available_cpus == 0) {