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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>
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9011bff4bd
commit
193de0c79d
1 changed files with 6 additions and 6 deletions
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@ -628,7 +628,7 @@ int acpi_processor_preregister_performance(
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retval = 0;
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/* Call _PSD for all CPUs */
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for_each_cpu(i) {
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for_each_possible_cpu(i) {
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pr = processors[i];
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if (!pr) {
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/* Look only at processors in ACPI namespace */
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@ -659,7 +659,7 @@ int acpi_processor_preregister_performance(
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* Now that we have _PSD data from all CPUs, lets setup P-state
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* domain info.
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*/
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for_each_cpu(i) {
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for_each_possible_cpu(i) {
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pr = processors[i];
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if (!pr)
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continue;
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@ -680,7 +680,7 @@ int acpi_processor_preregister_performance(
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}
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cpus_clear(covered_cpus);
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for_each_cpu(i) {
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for_each_possible_cpu(i) {
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pr = processors[i];
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if (!pr)
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continue;
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@ -704,7 +704,7 @@ int acpi_processor_preregister_performance(
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pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ANY;
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}
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for_each_cpu(j) {
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for_each_possible_cpu(j) {
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if (i == j)
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continue;
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@ -733,7 +733,7 @@ int acpi_processor_preregister_performance(
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count++;
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}
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for_each_cpu(j) {
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for_each_possible_cpu(j) {
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if (i == j)
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continue;
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@ -757,7 +757,7 @@ int acpi_processor_preregister_performance(
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error while parsing _PSD domain information. Assuming no coordination\n"));
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}
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for_each_cpu(i) {
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for_each_possible_cpu(i) {
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pr = processors[i];
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if (!pr || !pr->performance)
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continue;
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