percpu: make percpu symbols in cpufreq unique

This patch updates percpu related symbols in cpufreq such that percpu
symbols are unique and don't clash with local symbols.  This serves
two purposes of decreasing the possibility of global percpu symbol
collision and allowing dropping per_cpu__ prefix from percpu symbols.

* drivers/cpufreq/cpufreq.c: s/policy_cpu/cpufreq_policy_cpu/
* drivers/cpufreq/freq_table.c: s/show_table/cpufreq_show_table/
* arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c: s/drv_data/acfreq_data/
  					      s/old_perf/acfreq_old_perf/

Partly based on Rusty Russell's "alloc_percpu: rename percpu vars
which cause name clashes" patch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>

2 files changed, 14 insertions, 14 deletions

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 3938c78..af93a81 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -64,14 +64,14 @@ static DEFINE_SPINLOCK(cpufreq_driver_lock);
  * - Lock should not be held across
  *     __cpufreq_governor(data, CPUFREQ_GOV_STOP);
  */
-static DEFINE_PER_CPU(int, policy_cpu);
+static DEFINE_PER_CPU(int, cpufreq_policy_cpu);
 static DEFINE_PER_CPU(struct rw_semaphore, cpu_policy_rwsem);
 
 #define lock_policy_rwsem(mode, cpu)					\
 int lock_policy_rwsem_##mode						\
 (int cpu)								\
 {									\
-	int policy_cpu = per_cpu(policy_cpu, cpu);			\
+	int policy_cpu = per_cpu(cpufreq_policy_cpu, cpu);		\
 	BUG_ON(policy_cpu == -1);					\
 	down_##mode(&per_cpu(cpu_policy_rwsem, policy_cpu));		\
 	if (unlikely(!cpu_online(cpu))) {				\
@@ -90,7 +90,7 @@ EXPORT_SYMBOL_GPL(lock_policy_rwsem_write);
 
 void unlock_policy_rwsem_read(int cpu)
 {
-	int policy_cpu = per_cpu(policy_cpu, cpu);
+	int policy_cpu = per_cpu(cpufreq_policy_cpu, cpu);
 	BUG_ON(policy_cpu == -1);
 	up_read(&per_cpu(cpu_policy_rwsem, policy_cpu));
 }
@@ -98,7 +98,7 @@ EXPORT_SYMBOL_GPL(unlock_policy_rwsem_read);
 
 void unlock_policy_rwsem_write(int cpu)
 {
-	int policy_cpu = per_cpu(policy_cpu, cpu);
+	int policy_cpu = per_cpu(cpufreq_policy_cpu, cpu);
 	BUG_ON(policy_cpu == -1);
 	up_write(&per_cpu(cpu_policy_rwsem, policy_cpu));
 }
@@ -799,7 +799,7 @@ int cpufreq_add_dev_policy(unsigned int cpu, struct cpufreq_policy *policy,
 
 			/* Set proper policy_cpu */
 			unlock_policy_rwsem_write(cpu);
-			per_cpu(policy_cpu, cpu) = managed_policy->cpu;
+			per_cpu(cpufreq_policy_cpu, cpu) = managed_policy->cpu;
 
 			if (lock_policy_rwsem_write(cpu) < 0) {
 				/* Should not go through policy unlock path */
@@ -906,7 +906,7 @@ int cpufreq_add_dev_interface(unsigned int cpu, struct cpufreq_policy *policy,
 	if (!cpu_online(j))
 		continue;
 		per_cpu(cpufreq_cpu_data, j) = policy;
-		per_cpu(policy_cpu, j) = policy->cpu;
+		per_cpu(cpufreq_policy_cpu, j) = policy->cpu;
 	}
 	spin_unlock_irqrestore(&cpufreq_driver_lock, flags);
 
@@ -991,7 +991,7 @@ static int cpufreq_add_dev(struct sys_device *sys_dev)
 	cpumask_copy(policy->cpus, cpumask_of(cpu));
 
 	/* Initially set CPU itself as the policy_cpu */
-	per_cpu(policy_cpu, cpu) = cpu;
+	per_cpu(cpufreq_policy_cpu, cpu) = cpu;
 	ret = (lock_policy_rwsem_write(cpu) < 0);
 	WARN_ON(ret);
 
@@ -1946,7 +1946,7 @@ static int __init cpufreq_core_init(void)
 	int cpu;
 
 	for_each_possible_cpu(cpu) {
-		per_cpu(policy_cpu, cpu) = -1;
+		per_cpu(cpufreq_policy_cpu, cpu) = -1;
 		init_rwsem(&per_cpu(cpu_policy_rwsem, cpu));
 	}
 
diff --git a/drivers/cpufreq/freq_table.c b/drivers/cpufreq/freq_table.c
index a9bd3a0..0543221 100644
--- a/drivers/cpufreq/freq_table.c
+++ b/drivers/cpufreq/freq_table.c
@@ -174,7 +174,7 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
 }
 EXPORT_SYMBOL_GPL(cpufreq_frequency_table_target);
 
-static DEFINE_PER_CPU(struct cpufreq_frequency_table *, show_table);
+static DEFINE_PER_CPU(struct cpufreq_frequency_table *, cpufreq_show_table);
 /**
  * show_available_freqs - show available frequencies for the specified CPU
  */
@@ -185,10 +185,10 @@ static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf)
 	ssize_t count = 0;
 	struct cpufreq_frequency_table *table;
 
-	if (!per_cpu(show_table, cpu))
+	if (!per_cpu(cpufreq_show_table, cpu))
 		return -ENODEV;
 
-	table = per_cpu(show_table, cpu);
+	table = per_cpu(cpufreq_show_table, cpu);
 
 	for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
 		if (table[i].frequency == CPUFREQ_ENTRY_INVALID)
@@ -217,20 +217,20 @@ void cpufreq_frequency_table_get_attr(struct cpufreq_frequency_table *table,
 				      unsigned int cpu)
 {
 	dprintk("setting show_table for cpu %u to %p\n", cpu, table);
-	per_cpu(show_table, cpu) = table;
+	per_cpu(cpufreq_show_table, cpu) = table;
 }
 EXPORT_SYMBOL_GPL(cpufreq_frequency_table_get_attr);
 
 void cpufreq_frequency_table_put_attr(unsigned int cpu)
 {
 	dprintk("clearing show_table for cpu %u\n", cpu);
-	per_cpu(show_table, cpu) = NULL;
+	per_cpu(cpufreq_show_table, cpu) = NULL;
 }
 EXPORT_SYMBOL_GPL(cpufreq_frequency_table_put_attr);
 
 struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu)
 {
-	return per_cpu(show_table, cpu);
+	return per_cpu(cpufreq_show_table, cpu);
 }
 EXPORT_SYMBOL_GPL(cpufreq_frequency_get_table);