cpufreq: Kill userspace CPU boosting entirely

Kernel-based CPU boosting is used now, so stop userspace from messing with it by turning scaling_min_freq into a no-op. Note that this is done instead of making scaling_min_freq read-only so that userspace doesn't spit out error messages when it can't do its boosting. Signed-off-by: Sultan Alsawaf <[email protected]> Signed-off-by: Danny Lin <[email protected]>
kdrag0n · Jul 29, 2020 · d9d2fe5 · d9d2fe5
1 parent 0a5656b
commit d9d2fe5
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
@@ -706,6 +706,9 @@ static ssize_t store_##file_name					\
 	int ret, temp;							\
 	struct cpufreq_policy new_policy;				\
 									\
+	if (&policy->object == &policy->min)				\
+		return count;						\
+									\
 	memcpy(&new_policy, policy, sizeof(*policy));			\
 	new_policy.min = policy->user_policy.min;			\
 	new_policy.max = policy->user_policy.max;			\