lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

cpumask: convert shared_cpu_map in acpi_processor* structs to cpumask_var_t

Browse Source 
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>
This commit is contained in:
Rusty Russell
2008-12-31 18:08:47 -08:00
committed by Ingo Molnar
parent ee943a82b6
commit 2fdf66b491
7 changed files with 128 additions and 58 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
drivers/acpi/processor_perflib.c
View File

@@ -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);