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Date: Thu, 04 Jun 2009 14:01:31 -0700
From: Yinghai Lu <yinghai@...nel.org>
To: Avi Kivity <avi@...hat.com>, Ingo Molnar <mingo@...e.hu>,
Rusty Russell <rusty@...tcorp.com.au>,
Andrew Morton <akpm@...ux-foundation.org>,
Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] cpumask: alloc blank cpumask left over
avoid suprise when MAXSMP is enabled
Signed-off-by: Yinghai Lu <yinghai.lu@...nel.org>
diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index 54b6de2..71fe451 100644
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -552,7 +552,7 @@ static int __init acpi_cpufreq_early_init(void)
for_each_possible_cpu(i) {
if (!alloc_cpumask_var_node(
&per_cpu_ptr(acpi_perf_data, i)->shared_cpu_map,
- GFP_KERNEL, cpu_to_node(i))) {
+ GFP_KERNEL | __GFP_ZERO, cpu_to_node(i))) {
/* Freeing a NULL pointer is OK: alloc_percpu zeroes. */
free_acpi_perf_data();
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k7.c b/arch/x86/kernel/cpu/cpufreq/powernow-k7.c
index a8363e5..17940ed 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k7.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k7.c
@@ -323,7 +323,7 @@ static int powernow_acpi_init(void)
}
if (!alloc_cpumask_var(&acpi_processor_perf->shared_cpu_map,
- GFP_KERNEL)) {
+ GFP_KERNEL | __GFP_ZERO)) {
retval = -ENOMEM;
goto err05;
}
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
index f6b32d1..2e9428a 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
@@ -886,7 +886,8 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
/* notify BIOS that we exist */
acpi_processor_notify_smm(THIS_MODULE);
- if (!alloc_cpumask_var(&data->acpi_data.shared_cpu_map, GFP_KERNEL)) {
+ if (!alloc_cpumask_var(&data->acpi_data.shared_cpu_map,
+ GFP_KERNEL | __GFP_ZERO)) {
printk(KERN_ERR PFX
"unable to alloc powernow_k8_data cpumask\n");
ret_val = -ENOMEM;
diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c b/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
index c9f1fdc..3a6a559 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
@@ -471,7 +471,8 @@ static int centrino_target (struct cpufreq_policy *policy,
if (unlikely(!alloc_cpumask_var(&saved_mask, GFP_KERNEL)))
return -ENOMEM;
- if (unlikely(!alloc_cpumask_var(&covered_cpus, GFP_KERNEL))) {
+ if (unlikely(!alloc_cpumask_var(&covered_cpus,
+ GFP_KERNEL | __GFP_ZERO))) {
free_cpumask_var(saved_mask);
return -ENOMEM;
}
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 1d0aa9c..3dbfd3a 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -1297,7 +1297,7 @@ static __init int mce_init_device(void)
if (!mce_available(&boot_cpu_data))
return -EIO;
- alloc_cpumask_var(&mce_dev_initialized, GFP_KERNEL);
+ alloc_cpumask_var(&mce_dev_initialized, GFP_KERNEL | __GFP_ZERO);
err = mce_init_banks();
if (err)
diff --git a/arch/x86/kernel/tlb_uv.c b/arch/x86/kernel/tlb_uv.c
index 16f0fd4..2f718e2 100644
--- a/arch/x86/kernel/tlb_uv.c
+++ b/arch/x86/kernel/tlb_uv.c
@@ -844,7 +844,8 @@ static int __init uv_bau_init(void)
for_each_possible_cpu(cur_cpu)
alloc_cpumask_var_node(&per_cpu(uv_flush_tlb_mask, cur_cpu),
- GFP_KERNEL, cpu_to_node(cur_cpu));
+ GFP_KERNEL | __GFP_ZERO,
+ cpu_to_node(cur_cpu));
uv_bau_retry_limit = 1;
uv_nshift = uv_hub_info->n_val;
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 45ad328..62b854d 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -844,7 +844,8 @@ static int acpi_processor_add(struct acpi_device *device)
if (!pr)
return -ENOMEM;
- if (!alloc_cpumask_var(&pr->throttling.shared_cpu_map, GFP_KERNEL)) {
+ if (!alloc_cpumask_var(&pr->throttling.shared_cpu_map,
+ GFP_KERNEL | __GFP_ZERO)) {
kfree(pr);
return -ENOMEM;
}
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 47d2ad0..28648a2 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -808,7 +808,8 @@ static int cpufreq_add_dev(struct sys_device *sys_dev)
ret = -ENOMEM;
goto nomem_out;
}
- if (!alloc_cpumask_var(&policy->related_cpus, GFP_KERNEL)) {
+ if (!alloc_cpumask_var(&policy->related_cpus,
+ GFP_KERNEL | __GFP_ZERO)) {
free_cpumask_var(policy->cpus);
kfree(policy);
ret = -ENOMEM;
diff --git a/kernel/sched_cpupri.c b/kernel/sched_cpupri.c
index cdd3c89..ce7cec8 100644
--- a/kernel/sched_cpupri.c
+++ b/kernel/sched_cpupri.c
@@ -165,7 +165,7 @@ int __init_refok cpupri_init(struct cpupri *cp, bool bootmem)
vec->count = 0;
if (bootmem)
alloc_bootmem_cpumask_var(&vec->mask);
- else if (!alloc_cpumask_var(&vec->mask, GFP_KERNEL))
+ else if (!alloc_cpumask_var(&vec->mask, GFP_KERNEL | __GFP_ZERO))
goto cleanup;
}
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index f2c66f8..181cbe5 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -1592,7 +1592,8 @@ static inline void init_sched_rt_class(void)
for_each_possible_cpu(i)
alloc_cpumask_var_node(&per_cpu(local_cpu_mask, i),
- GFP_KERNEL, cpu_to_node(i));
+ GFP_KERNEL | __GFP_ZERO,
+ cpu_to_node(i));
}
#endif /* CONFIG_SMP */
diff --git a/kernel/smp.c b/kernel/smp.c
index 858baac..0c7b82f 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -52,8 +52,9 @@ hotplug_cfd(struct notifier_block *nfb, unsigned long action, void *hcpu)
switch (action) {
case CPU_UP_PREPARE:
case CPU_UP_PREPARE_FROZEN:
- if (!alloc_cpumask_var_node(&cfd->cpumask, GFP_KERNEL,
- cpu_to_node(cpu)))
+ if (!alloc_cpumask_var_node(&cfd->cpumask,
+ GFP_KERNEL | __GFP_ZERO,
+ cpu_to_node(cpu)))
return NOTIFY_BAD;
break;
--
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