cpumask: convert drivers/idle/i7300_idle.c to cpumask_var_t

Fairly simple transformation:
1) cpumask_t -> cpumask_var_t and alloc_cpumask_var/free_cpumask_var
   (which are a NOOP unless CONFIG_CPUMASK_OFFSTACK=y).
2) cpu_set -> cpumask_set_cpu
3) cpus_weight -> cpumask_weight
4) cpu_clear -> cpumask_clear_cpu

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
To: Andy Henroid <andrew.d.henroid@intel.com>

1 files changed, 9 insertions, 6 deletions

diff --git a/drivers/idle/i7300_idle.c b/drivers/idle/i7300_idle.c
index 1f20a042a4f5..dd253002cd50 100644
--- a/drivers/idle/i7300_idle.c
+++ b/drivers/idle/i7300_idle.c
@@ -81,7 +81,7 @@ static u8 i7300_idle_thrtctl_saved;
 static u8 i7300_idle_thrtlow_saved;
 static u32 i7300_idle_mc_saved;
 
-static cpumask_t idle_cpumask;
+static cpumask_var_t idle_cpumask;
 static ktime_t start_ktime;
 static unsigned long avg_idle_us;
 
@@ -459,9 +459,9 @@ static int i7300_idle_notifier(struct notifier_block *nb, unsigned long val,
         spin_lock_irqsave(&i7300_idle_lock, flags);
         if (val == IDLE_START) {
 
-                cpu_set(smp_processor_id(), idle_cpumask);
+                cpumask_set_cpu(smp_processor_id(), idle_cpumask);
 
-                if (cpus_weight(idle_cpumask) != num_online_cpus())
+                if (cpumask_weight(idle_cpumask) != num_online_cpus())
                         goto end;
 
                 now_ktime = ktime_get();
@@ -478,8 +478,8 @@ static int i7300_idle_notifier(struct notifier_block *nb, unsigned long val,
                 i7300_idle_ioat_start();
 
         } else if (val == IDLE_END) {
-                cpu_clear(smp_processor_id(), idle_cpumask);
-                if (cpus_weight(idle_cpumask) == (num_online_cpus() - 1)) {
+                cpumask_clear_cpu(smp_processor_id(), idle_cpumask);
+                if (cpumask_weight(idle_cpumask) == (num_online_cpus() - 1)) {
                         /* First CPU coming out of idle */
                         u64 idle_duration_us;
 
@@ -553,7 +553,6 @@ struct debugfs_file_info {
 static int __init i7300_idle_init(void)
 {
         spin_lock_init(&i7300_idle_lock);
-        cpus_clear(idle_cpumask);
         total_us = 0;
 
         if (i7300_idle_platform_probe(&fbd_dev, &ioat_dev, forceload))
@@ -565,6 +564,9 @@ static int __init i7300_idle_init(void)
         if (i7300_idle_ioat_init())
                 return -ENODEV;
 
+        if (!zalloc_cpumask_var(&idle_cpumask, GFP_KERNEL))
+                return -ENOMEM;
+
         debugfs_dir = debugfs_create_dir("i7300_idle", NULL);
         if (debugfs_dir) {
                 int i = 0;
@@ -589,6 +591,7 @@ static int __init i7300_idle_init(void)
 static void __exit i7300_idle_exit(void)
 {
         idle_notifier_unregister(&i7300_idle_nb);
+        free_cpumask_var(idle_cpumask);
 
         if (debugfs_dir) {
                 int i = 0;