cpumask: use zalloc_cpumask_var() where possible

Remove open-coded zalloc_cpumask_var() and zalloc_cpumask_var_node().

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

4 files changed, 4 insertions, 8 deletions

diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index 11088cf10319..8ba0ed0b9ddb 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -511,7 +511,7 @@ int acpi_processor_preregister_performance(
         struct acpi_processor *match_pr;
         struct acpi_psd_package *match_pdomain;
 
-        if (!alloc_cpumask_var(&covered_cpus, GFP_KERNEL))
+        if (!zalloc_cpumask_var(&covered_cpus, GFP_KERNEL))
                 return -ENOMEM;
 
         mutex_lock(&performance_mutex);
@@ -558,7 +558,6 @@ int acpi_processor_preregister_performance(
          * Now that we have _PSD data from all CPUs, lets setup P-state 
          * domain info.
          */
-        cpumask_clear(covered_cpus);
         for_each_possible_cpu(i) {
                 pr = per_cpu(processors, i);
                 if (!pr)
diff --git a/drivers/acpi/processor_throttling.c b/drivers/acpi/processor_throttling.c
index ce7cf3bc5101..4c6c14c1e307 100644
--- a/drivers/acpi/processor_throttling.c
+++ b/drivers/acpi/processor_throttling.c
@@ -77,7 +77,7 @@ static int acpi_processor_update_tsd_coord(void)
         struct acpi_tsd_package *pdomain, *match_pdomain;
         struct acpi_processor_throttling *pthrottling, *match_pthrottling;
 
-        if (!alloc_cpumask_var(&covered_cpus, GFP_KERNEL))
+        if (!zalloc_cpumask_var(&covered_cpus, GFP_KERNEL))
                 return -ENOMEM;
 
         /*
@@ -105,7 +105,6 @@ static int acpi_processor_update_tsd_coord(void)
         if (retval)
                 goto err_ret;
 
-        cpumask_clear(covered_cpus);
         for_each_possible_cpu(i) {
                 pr = per_cpu(processors, i);
                 if (!pr)
diff --git a/drivers/net/sfc/efx.c b/drivers/net/sfc/efx.c
index 07a7e4b8f8fc..cc4b2f99989d 100644
--- a/drivers/net/sfc/efx.c
+++ b/drivers/net/sfc/efx.c
@@ -884,13 +884,12 @@ static int efx_wanted_rx_queues(void)
         int count;
         int cpu;
 
-        if (unlikely(!alloc_cpumask_var(&core_mask, GFP_KERNEL))) {
+        if (unlikely(!zalloc_cpumask_var(&core_mask, GFP_KERNEL))) {
                 printk(KERN_WARNING
                        "sfc: RSS disabled due to allocation failure\n");
                 return 1;
         }
 
-        cpumask_clear(core_mask);
         count = 0;
         for_each_online_cpu(cpu) {
                 if (!cpumask_test_cpu(cpu, core_mask)) {
diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c
index 8574622e36a5..c9e2ae90f195 100644
--- a/drivers/oprofile/buffer_sync.c
+++ b/drivers/oprofile/buffer_sync.c
@@ -154,9 +154,8 @@ int sync_start(void)
 {
         int err;
 
-        if (!alloc_cpumask_var(&marked_cpus, GFP_KERNEL))
+        if (!zalloc_cpumask_var(&marked_cpus, GFP_KERNEL))
                 return -ENOMEM;
-        cpumask_clear(marked_cpus);
 
         start_cpu_work();