ACPI: processor: driver doesn't need to evaluate _PDC

Now that the early _PDC evaluation path knows how to correctly
evaluate _PDC on only physically present processors, there's no
need for the processor driver to evaluate it later when it loads.

To cover the hotplug case, push _PDC evaluation down into the
hotplug paths.

Cc: x86@kernel.org
Cc: Tony Luck <tony.luck@intel.com>
Acked-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>

arch/ia64/kernel/acpi.c

@@ -44,6 +44,7 @@
 #include <linux/efi.h>
 #include <linux/mmzone.h>
 #include <linux/nodemask.h>
+#include <acpi/processor.h>
 #include <asm/io.h>
 #include <asm/iosapic.h>
 #include <asm/machvec.h>
@@ -907,6 +908,8 @@ int acpi_map_lsapic(acpi_handle handle, int *pcpu)
 	cpu_set(cpu, cpu_present_map);
 	ia64_cpu_to_sapicid[cpu] = physid;
 
+	acpi_processor_set_pdc(handle);
+
 	*pcpu = cpu;
 	return (0);
 }

arch/x86/kernel/acpi/boot.c

@@ -490,6 +490,7 @@ int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
  *  ACPI based hotplug support for CPU
  */
 #ifdef CONFIG_ACPI_HOTPLUG_CPU
+#include <acpi/processor.h>
 
 static void acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
 {
@@ -567,6 +568,8 @@ static int __cpuinit _acpi_map_lsapic(acpi_handle handle, int *pcpu)
 		goto free_new_map;
 	}
 
+	acpi_processor_set_pdc(handle);
+
 	cpu = cpumask_first(new_map);
 	acpi_map_cpu2node(handle, cpu, physid);
 

drivers/acpi/processor_core.c

@@ -317,8 +317,6 @@ acpi_processor_eval_pdc(acpi_handle handle, struct acpi_object_list *pdc_in)
 	return status;
 }
 
-static int early_pdc_done;
-
 void acpi_processor_set_pdc(acpi_handle handle)
 {
 	struct acpi_object_list *obj_list;
@@ -326,9 +324,6 @@ void acpi_processor_set_pdc(acpi_handle handle)
 	if (arch_has_acpi_pdc() == false)
 		return;
 
-	if (early_pdc_done)
-		return;
-
 	obj_list = acpi_processor_alloc_pdc();
 	if (!obj_list)
 		return;
@@ -369,6 +364,4 @@ void __init acpi_early_processor_set_pdc(void)
 	acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT,
 			    ACPI_UINT32_MAX,
 			    early_init_pdc, NULL, NULL, NULL);
-
-	early_pdc_done = 1;
 }

drivers/acpi/processor_driver.c

@@ -608,9 +608,6 @@ static int __cpuinit acpi_processor_add(struct acpi_device *device)
 		goto err_remove_fs;
 	}
 
-	/* _PDC call should be done before doing anything else (if reqd.). */
-	acpi_processor_set_pdc(pr->handle);
-
 #ifdef CONFIG_CPU_FREQ
 	acpi_processor_ppc_has_changed(pr, 0);
 #endif