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cpumask: convert struct cpufreq_policy to cpumask_var_t

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Impact: use new cpumask API to reduce memory usage

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).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Acked-by: Dave Jones <davej@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Rusty Russell 2009-01-04 05:18:06 -08:00 committed by Ingo Molnar
parent 5cb0535f17
commit 835481d9bc
10 changed files with 62 additions and 48 deletions
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10
arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
View file

@ -411,7 +411,7 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
#ifdef CONFIG_HOTPLUG_CPU
/* cpufreq holds the hotplug lock, so we are safe from here on */
cpus_and(online_policy_cpus, cpu_online_map, policy->cpus);
cpumask_and(&online_policy_cpus, cpu_online_mask, policy->cpus);
#else
online_policy_cpus = policy->cpus;
#endif
@ -626,15 +626,15 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
*/
if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL ||
policy->shared_type == CPUFREQ_SHARED_TYPE_ANY) {
cpumask_copy(&policy->cpus, perf->shared_cpu_map);
cpumask_copy(policy->cpus, perf->shared_cpu_map);
}
cpumask_copy(&policy->related_cpus, perf->shared_cpu_map);
cpumask_copy(policy->related_cpus, perf->shared_cpu_map);
#ifdef CONFIG_SMP
dmi_check_system(sw_any_bug_dmi_table);
if (bios_with_sw_any_bug && cpus_weight(policy->cpus) == 1) {
if (bios_with_sw_any_bug && cpumask_weight(policy->cpus) == 1) {
policy->shared_type = CPUFREQ_SHARED_TYPE_ALL;
policy->cpus = per_cpu(cpu_core_map, cpu);
cpumask_copy(policy->cpus, cpu_core_mask(cpu));
}
#endif

8
arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
View file

@ -122,7 +122,7 @@ static int cpufreq_p4_target(struct cpufreq_policy *policy,
return 0;
/* notifiers */
for_each_cpu_mask_nr(i, policy->cpus) {
for_each_cpu(i, policy->cpus) {
freqs.cpu = i;
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
}
@ -130,11 +130,11 @@ static int cpufreq_p4_target(struct cpufreq_policy *policy,
/* run on each logical CPU, see section 13.15.3 of IA32 Intel Architecture Software
* Developer's Manual, Volume 3
*/
for_each_cpu_mask_nr(i, policy->cpus)
for_each_cpu(i, policy->cpus)
cpufreq_p4_setdc(i, p4clockmod_table[newstate].index);
/* notifiers */
for_each_cpu_mask_nr(i, policy->cpus) {
for_each_cpu(i, policy->cpus) {
freqs.cpu = i;
cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
}
@ -203,7 +203,7 @@ static int cpufreq_p4_cpu_init(struct cpufreq_policy *policy)
unsigned int i;
#ifdef CONFIG_SMP
policy->cpus = per_cpu(cpu_sibling_map, policy->cpu);
cpumask_copy(policy->cpus, &per_cpu(cpu_sibling_map, policy->cpu));
#endif
/* Errata workaround */

6
arch/x86/kernel/cpu/cpufreq/powernow-k8.c
View file

@ -1199,10 +1199,10 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
set_cpus_allowed_ptr(current, &oldmask);
if (cpu_family == CPU_HW_PSTATE)
pol->cpus = cpumask_of_cpu(pol->cpu);
cpumask_copy(pol->cpus, cpumask_of(pol->cpu));
else
pol->cpus = per_cpu(cpu_core_map, pol->cpu);
data->available_cores = &(pol->cpus);
cpumask_copy(pol->cpus, &per_cpu(cpu_core_map, pol->cpu));
data->available_cores = pol->cpus;
/* Take a crude guess here.
* That guess was in microseconds, so multiply with 1000 */

2
arch/x86/kernel/cpu/cpufreq/powernow-k8.h
View file

@ -53,7 +53,7 @@ struct powernow_k8_data {
/* we need to keep track of associated cores, but let cpufreq
* handle hotplug events - so just point at cpufreq pol->cpus
* structure */
cpumask_t *available_cores;
struct cpumask *available_cores;
};

14
arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
View file

@ -492,8 +492,8 @@ static int centrino_target (struct cpufreq_policy *policy,
}
first_cpu = 1;
for_each_cpu_mask_nr(j, policy->cpus) {
const cpumask_t *mask;
for_each_cpu(j, policy->cpus) {
const struct cpumask *mask;
/* cpufreq holds the hotplug lock, so we are safe here */
if (!cpu_online(j))
@ -504,9 +504,9 @@ static int centrino_target (struct cpufreq_policy *policy,
* Make sure we are running on CPU that wants to change freq
*/
if (policy->shared_type == CPUFREQ_SHARED_TYPE_ANY)
mask = &policy->cpus;
mask = policy->cpus;
else
mask = &cpumask_of_cpu(j);
mask = cpumask_of(j);
set_cpus_allowed_ptr(current, mask);
preempt_disable();
@ -538,7 +538,7 @@ static int centrino_target (struct cpufreq_policy *policy,
dprintk("target=%dkHz old=%d new=%d msr=%04x\n",
target_freq, freqs.old, freqs.new, msr);
for_each_cpu_mask_nr(k, policy->cpus) {
for_each_cpu(k, policy->cpus) {
if (!cpu_online(k))
continue;
freqs.cpu = k;
@ -563,7 +563,7 @@ static int centrino_target (struct cpufreq_policy *policy,
preempt_enable();
}
for_each_cpu_mask_nr(k, policy->cpus) {
for_each_cpu(k, policy->cpus) {
if (!cpu_online(k))
continue;
freqs.cpu = k;
@ -586,7 +586,7 @@ static int centrino_target (struct cpufreq_policy *policy,
tmp = freqs.new;
freqs.new = freqs.old;
freqs.old = tmp;
for_each_cpu_mask_nr(j, policy->cpus) {
for_each_cpu(j, policy->cpus) {
if (!cpu_online(j))
continue;
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);

18
arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
View file

@ -229,7 +229,7 @@ static unsigned int speedstep_detect_chipset (void)
return 0;
}
static unsigned int _speedstep_get(const cpumask_t *cpus)
static unsigned int _speedstep_get(const struct cpumask *cpus)
{
unsigned int speed;
cpumask_t cpus_allowed;
@ -244,7 +244,7 @@ static unsigned int _speedstep_get(const cpumask_t *cpus)
static unsigned int speedstep_get(unsigned int cpu)
{
return _speedstep_get(&cpumask_of_cpu(cpu));
return _speedstep_get(cpumask_of(cpu));
}
/**
@ -267,7 +267,7 @@ static int speedstep_target (struct cpufreq_policy *policy,
if (cpufreq_frequency_table_target(policy, &speedstep_freqs[0], target_freq, relation, &newstate))
return -EINVAL;
freqs.old = _speedstep_get(&policy->cpus);
freqs.old = _speedstep_get(policy->cpus);
freqs.new = speedstep_freqs[newstate].frequency;
freqs.cpu = policy->cpu;
@ -279,20 +279,20 @@ static int speedstep_target (struct cpufreq_policy *policy,
cpus_allowed = current->cpus_allowed;
for_each_cpu_mask_nr(i, policy->cpus) {
for_each_cpu(i, policy->cpus) {
freqs.cpu = i;
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
}
/* switch to physical CPU where state is to be changed */
set_cpus_allowed_ptr(current, &policy->cpus);
set_cpus_allowed_ptr(current, policy->cpus);
speedstep_set_state(newstate);
/* allow to be run on all CPUs */
set_cpus_allowed_ptr(current, &cpus_allowed);
for_each_cpu_mask_nr(i, policy->cpus) {
for_each_cpu(i, policy->cpus) {
freqs.cpu = i;
cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
}
@ -322,11 +322,11 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
/* only run on CPU to be set, or on its sibling */
#ifdef CONFIG_SMP
policy->cpus = per_cpu(cpu_sibling_map, policy->cpu);
cpumask_copy(policy->cpus, &per_cpu(cpu_sibling_map, policy->cpu));
#endif
cpus_allowed = current->cpus_allowed;
set_cpus_allowed_ptr(current, &policy->cpus);
set_cpus_allowed_ptr(current, policy->cpus);
/* detect low and high frequency and transition latency */
result = speedstep_get_freqs(speedstep_processor,
@ -339,7 +339,7 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
return result;
/* get current speed setting */
speed = _speedstep_get(&policy->cpus);
speed = _speedstep_get(policy->cpus);
if (!speed)
return -EIO;

42
drivers/cpufreq/cpufreq.c
View file

@ -584,12 +584,12 @@ static ssize_t show_scaling_available_governors(struct cpufreq_policy *policy,
return i;
}
static ssize_t show_cpus(cpumask_t mask, char *buf)
static ssize_t show_cpus(const struct cpumask *mask, char *buf)
{
ssize_t i = 0;
unsigned int cpu;
for_each_cpu_mask_nr(cpu, mask) {
for_each_cpu(cpu, mask) {
if (i)
i += scnprintf(&buf[i], (PAGE_SIZE - i - 2), " ");
i += scnprintf(&buf[i], (PAGE_SIZE - i - 2), "%u", cpu);
@ -606,7 +606,7 @@ static ssize_t show_cpus(cpumask_t mask, char *buf)
*/
static ssize_t show_related_cpus(struct cpufreq_policy *policy, char *buf)
{
if (cpus_empty(policy->related_cpus))
if (cpumask_empty(policy->related_cpus))
return show_cpus(policy->cpus, buf);
return show_cpus(policy->related_cpus, buf);
}
@ -806,9 +806,20 @@ static int cpufreq_add_dev(struct sys_device *sys_dev)
ret = -ENOMEM;
goto nomem_out;
}
if (!alloc_cpumask_var(&policy->cpus, GFP_KERNEL)) {
kfree(policy);
ret = -ENOMEM;
goto nomem_out;
}
if (!alloc_cpumask_var(&policy->related_cpus, GFP_KERNEL)) {
free_cpumask_var(policy->cpus);
kfree(policy);
ret = -ENOMEM;
goto nomem_out;
}
policy->cpu = cpu;
policy->cpus = cpumask_of_cpu(cpu);
cpumask_copy(policy->cpus, cpumask_of(cpu));
/* Initially set CPU itself as the policy_cpu */
per_cpu(policy_cpu, cpu) = cpu;
@ -843,7 +854,7 @@ static int cpufreq_add_dev(struct sys_device *sys_dev)
}
#endif
for_each_cpu_mask_nr(j, policy->cpus) {
for_each_cpu(j, policy->cpus) {
if (cpu == j)
continue;
@ -861,7 +872,7 @@ static int cpufreq_add_dev(struct sys_device *sys_dev)
goto err_out_driver_exit;
spin_lock_irqsave(&cpufreq_driver_lock, flags);
managed_policy->cpus = policy->cpus;
cpumask_copy(managed_policy->cpus, policy->cpus);
per_cpu(cpufreq_cpu_data, cpu) = managed_policy;
spin_unlock_irqrestore(&cpufreq_driver_lock, flags);
@ -916,14 +927,14 @@ static int cpufreq_add_dev(struct sys_device *sys_dev)
}
spin_lock_irqsave(&cpufreq_driver_lock, flags);
for_each_cpu_mask_nr(j, policy->cpus) {
for_each_cpu(j, policy->cpus) {
per_cpu(cpufreq_cpu_data, j) = policy;
per_cpu(policy_cpu, j) = policy->cpu;
}
spin_unlock_irqrestore(&cpufreq_driver_lock, flags);
/* symlink affected CPUs */
for_each_cpu_mask_nr(j, policy->cpus) {
for_each_cpu(j, policy->cpus) {
if (j == cpu)
continue;
if (!cpu_online(j))
@ -963,7 +974,7 @@ static int cpufreq_add_dev(struct sys_device *sys_dev)
err_out_unregister:
spin_lock_irqsave(&cpufreq_driver_lock, flags);
for_each_cpu_mask_nr(j, policy->cpus)
for_each_cpu(j, policy->cpus)
per_cpu(cpufreq_cpu_data, j) = NULL;
spin_unlock_irqrestore(&cpufreq_driver_lock, flags);
@ -1024,7 +1035,7 @@ static int __cpufreq_remove_dev(struct sys_device *sys_dev)
*/
if (unlikely(cpu != data->cpu)) {
dprintk("removing link\n");
cpu_clear(cpu, data->cpus);
cpumask_clear_cpu(cpu, data->cpus);
spin_unlock_irqrestore(&cpufreq_driver_lock, flags);
sysfs_remove_link(&sys_dev->kobj, "cpufreq");
cpufreq_cpu_put(data);
@ -1045,8 +1056,8 @@ static int __cpufreq_remove_dev(struct sys_device *sys_dev)
* per_cpu(cpufreq_cpu_data) while holding the lock, and remove
* the sysfs links afterwards.
*/
if (unlikely(cpus_weight(data->cpus) > 1)) {
for_each_cpu_mask_nr(j, data->cpus) {
if (unlikely(cpumask_weight(data->cpus) > 1)) {
for_each_cpu(j, data->cpus) {
if (j == cpu)
continue;
per_cpu(cpufreq_cpu_data, j) = NULL;
@ -1055,8 +1066,8 @@ static int __cpufreq_remove_dev(struct sys_device *sys_dev)
spin_unlock_irqrestore(&cpufreq_driver_lock, flags);
if (unlikely(cpus_weight(data->cpus) > 1)) {
for_each_cpu_mask_nr(j, data->cpus) {
if (unlikely(cpumask_weight(data->cpus) > 1)) {
for_each_cpu(j, data->cpus) {
if (j == cpu)
continue;
dprintk("removing link for cpu %u\n", j);
@ -1090,7 +1101,10 @@ static int __cpufreq_remove_dev(struct sys_device *sys_dev)
if (cpufreq_driver->exit)
cpufreq_driver->exit(data);
free_cpumask_var(data->related_cpus);
free_cpumask_var(data->cpus);
kfree(data);
per_cpu(cpufreq_cpu_data, cpu) = NULL;
cpufreq_debug_enable_ratelimit();
return 0;

2
drivers/cpufreq/cpufreq_conservative.c
View file

@ -498,7 +498,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
return rc;
}
for_each_cpu_mask_nr(j, policy->cpus) {
for_each_cpu(j, policy->cpus) {
struct cpu_dbs_info_s *j_dbs_info;
j_dbs_info = &per_cpu(cpu_dbs_info, j);
j_dbs_info->cur_policy = policy;

4
drivers/cpufreq/cpufreq_ondemand.c
View file

@ -400,7 +400,7 @@ static void dbs_check_cpu(struct cpu_dbs_info_s *this_dbs_info)
/* Get Absolute Load - in terms of freq */
max_load_freq = 0;
for_each_cpu_mask_nr(j, policy->cpus) {
for_each_cpu(j, policy->cpus) {
struct cpu_dbs_info_s *j_dbs_info;
cputime64_t cur_wall_time, cur_idle_time;
unsigned int idle_time, wall_time;
@ -568,7 +568,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
return rc;
}
for_each_cpu_mask_nr(j, policy->cpus) {
for_each_cpu(j, policy->cpus) {
struct cpu_dbs_info_s *j_dbs_info;
j_dbs_info = &per_cpu(cpu_dbs_info, j);
j_dbs_info->cur_policy = policy;

4
include/linux/cpufreq.h
View file

@ -80,8 +80,8 @@ struct cpufreq_real_policy {
};
struct cpufreq_policy {
cpumask_t cpus; /* CPUs requiring sw coordination */
cpumask_t related_cpus; /* CPUs with any coordination */
cpumask_var_t cpus; /* CPUs requiring sw coordination */
cpumask_var_t related_cpus; /* CPUs with any coordination */
unsigned int shared_type; /* ANY or ALL affected CPUs
should set cpufreq */
unsigned int cpu; /* cpu nr of registered CPU */