From: Shilpasri G Bhat <shilpa.b...@linux.vnet.ibm.com>
commit 1b0289848d5d ("cpufreq: powernv: Add sysfs attributes to show
throttle stats") used policy->driver_data as a flag for one-time creation
of throttle sysfs files. Instead of this use 'kernfs_find_and_get()' to
check if the attribute already exists. This is required as
policy->driver_data is used for other purposes in the later patch.
Signed-off-by: Shilpasri G Bhat <shilpa.b...@linux.vnet.ibm.com>
Signed-off-by: Akshay Adiga <akshay.ad...@linux.vnet.ibm.com>
Acked-by: Viresh Kumar <viresh.ku...@linaro.org>
---
drivers/cpufreq/powernv-cpufreq.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/cpufreq/powernv-cpufreq.c
b/drivers/cpufreq/powernv-cpufreq.c
index 39ac78c..e2e2219 100644
--- a/drivers/cpufreq/powernv-cpufreq.c
+++ b/drivers/cpufreq/powernv-cpufreq.c
@@ -455,13 +455,15 @@ static int powernv_cpufreq_target_index(struct
cpufreq_policy *policy,
static int powernv_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
int base, i;
+ struct kernfs_node *kn;
base = cpu_first_thread_sibling(policy->cpu);
for (i = 0; i < threads_per_core; i++)
cpumask_set_cpu(base + i, policy->cpus);
- if (!policy->driver_data) {
+ kn = kernfs_find_and_get(policy->kobj.sd, throttle_attr_grp.name);
+ if (!kn) {
int ret;
ret = sysfs_create_group(&policy->kobj, &throttle_attr_grp);
@@ -470,11 +472,8 @@ static int powernv_cpufreq_cpu_init(struct cpufreq_policy
*policy)
policy->cpu);
return ret;
}
- /*
- * policy->driver_data is used as a flag for one-time
- * creation of throttle sysfs files.
- */
- policy->driver_data = policy;
+ } else {
+ kernfs_put(kn);
}
return cpufreq_table_validate_and_show(policy, powernv_freqs);
}
--
2.5.5
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/linuxppc-dev
