cpumask: convert shared_cpu_map in acpi_processor* structs to cpumask_var_t

Impact: Reduce memory usage, use new API.

This is part of an effort to reduce structure sizes for machines
configured with large NR_CPUS.  cpumask_t gets replaced by
cpumask_var_t, which is either struct cpumask[1] (small NR_CPUS) or
struct cpumask * (large NR_CPUS).

(Changes to powernow-k* by <travis>.)

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 16 insertions, 12 deletions

diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index 0d7b772..846e227 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -588,12 +588,15 @@ int acpi_processor_preregister_performance(
 	int count, count_target;
 	int retval = 0;
 	unsigned int i, j;
-	cpumask_t covered_cpus;
+	cpumask_var_t covered_cpus;
 	struct acpi_processor *pr;
 	struct acpi_psd_package *pdomain;
 	struct acpi_processor *match_pr;
 	struct acpi_psd_package *match_pdomain;
 
+	if (!alloc_cpumask_var(&covered_cpus, GFP_KERNEL))
+		return -ENOMEM;
+
 	mutex_lock(&performance_mutex);
 
 	retval = 0;
@@ -617,7 +620,7 @@ int acpi_processor_preregister_performance(
 		}
 
 		pr->performance = percpu_ptr(performance, i);
-		cpu_set(i, pr->performance->shared_cpu_map);
+		cpumask_set_cpu(i, pr->performance->shared_cpu_map);
 		if (acpi_processor_get_psd(pr)) {
 			retval = -EINVAL;
 			continue;
@@ -650,18 +653,18 @@ int acpi_processor_preregister_performance(
 		}
 	}
 
-	cpus_clear(covered_cpus);
+	cpumask_clear(covered_cpus);
 	for_each_possible_cpu(i) {
 		pr = per_cpu(processors, i);
 		if (!pr)
 			continue;
 
-		if (cpu_isset(i, covered_cpus))
+		if (cpumask_test_cpu(i, covered_cpus))
 			continue;
 
 		pdomain = &(pr->performance->domain_info);
-		cpu_set(i, pr->performance->shared_cpu_map);
-		cpu_set(i, covered_cpus);
+		cpumask_set_cpu(i, pr->performance->shared_cpu_map);
+		cpumask_set_cpu(i, covered_cpus);
 		if (pdomain->num_processors <= 1)
 			continue;
 
@@ -699,8 +702,8 @@ int acpi_processor_preregister_performance(
 				goto err_ret;
 			}
 
-			cpu_set(j, covered_cpus);
-			cpu_set(j, pr->performance->shared_cpu_map);
+			cpumask_set_cpu(j, covered_cpus);
+			cpumask_set_cpu(j, pr->performance->shared_cpu_map);
 			count++;
 		}
 
@@ -718,8 +721,8 @@ int acpi_processor_preregister_performance(
 
 			match_pr->performance->shared_type = 
 					pr->performance->shared_type;
-			match_pr->performance->shared_cpu_map =
-				pr->performance->shared_cpu_map;
+			cpumask_copy(match_pr->performance->shared_cpu_map,
+				     pr->performance->shared_cpu_map);
 		}
 	}
 
@@ -731,14 +734,15 @@ err_ret:
 
 		/* Assume no coordination on any error parsing domain info */
 		if (retval) {
-			cpus_clear(pr->performance->shared_cpu_map);
-			cpu_set(i, pr->performance->shared_cpu_map);
+			cpumask_clear(pr->performance->shared_cpu_map);
+			cpumask_set_cpu(i, pr->performance->shared_cpu_map);
 			pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ALL;
 		}
 		pr->performance = NULL; /* Will be set for real in register */
 	}
 
 	mutex_unlock(&performance_mutex);
+	free_cpumask_var(covered_cpus);
 	return retval;
 }
 EXPORT_SYMBOL(acpi_processor_preregister_performance);