ACPI: use for_each_possible_cpu() instead of for_each_cpu()

for_each_cpu() actually iterates across all possible CPUs.  We've had mistakes
in the past where people were using for_each_cpu() where they should have been
iterating across only online or present CPUs.  This is inefficient and
possibly buggy.

We're renaming for_each_cpu() to for_each_possible_cpu() to avoid this in the
future.
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/processor_perflib.c

@@ -628,7 +628,7 @@ int acpi_processor_preregister_performance(
 	retval = 0;
 
 	/* Call _PSD for all CPUs */
-	for_each_cpu(i) {
+	for_each_possible_cpu(i) {
 		pr = processors[i];
 		if (!pr) {
 			/* Look only at processors in ACPI namespace */
@@ -659,7 +659,7 @@ int acpi_processor_preregister_performance(
 	 * Now that we have _PSD data from all CPUs, lets setup P-state 
 	 * domain info.
 	 */
-	for_each_cpu(i) {
+	for_each_possible_cpu(i) {
 		pr = processors[i];
 		if (!pr)
 			continue;
@@ -680,7 +680,7 @@ int acpi_processor_preregister_performance(
 	}
 
 	cpus_clear(covered_cpus);
-	for_each_cpu(i) {
+	for_each_possible_cpu(i) {
 		pr = processors[i];
 		if (!pr)
 			continue;
@@ -704,7 +704,7 @@ int acpi_processor_preregister_performance(
 			pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ANY;
 		}
 
-		for_each_cpu(j) {
+		for_each_possible_cpu(j) {
 			if (i == j)
 				continue;
 
@@ -733,7 +733,7 @@ int acpi_processor_preregister_performance(
 			count++;
 		}
 
-		for_each_cpu(j) {
+		for_each_possible_cpu(j) {
 			if (i == j)
 				continue;
 
@@ -757,7 +757,7 @@ int acpi_processor_preregister_performance(
 		ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error while parsing _PSD domain information. Assuming no coordination\n"));
 	}
 
-	for_each_cpu(i) {
+	for_each_possible_cpu(i) {
 		pr = processors[i];
 		if (!pr || !pr->performance)
 			continue;