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>
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 @@
* - 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 @@
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 @@
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 @@
/* 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 @@
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 @@
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 @@
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));
}