intel_pstate: delete scheduler hook in HWP mode

The cpufreq/scaling_cur_freq sysfs attribute is now provided by
shared x86 cpufreq code on modern x86 systems, including
all systems supported by the intel_pstate driver.

In HWP mode, maintaining that value was the sole purpose of
the scheduler hook, intel_pstate_update_util_hwp(),
so it can now be removed.

Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 3 insertions, 11 deletions

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index be0290a1a5e2..b00a45595c89 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -1736,16 +1736,6 @@ static void intel_pstate_adjust_pstate(struct cpudata *cpu, int target_pstate)
                 fp_toint(cpu->iowait_boost * 100));
 }
 
-static void intel_pstate_update_util_hwp(struct update_util_data *data,
-                                         u64 time, unsigned int flags)
-{
-        struct cpudata *cpu = container_of(data, struct cpudata, update_util);
-        u64 delta_ns = time - cpu->sample.time;
-
-        if ((s64)delta_ns >= INTEL_PSTATE_HWP_SAMPLING_INTERVAL)
-                intel_pstate_sample(cpu, time);
-}
-
 static void intel_pstate_update_util_pid(struct update_util_data *data,
                                          u64 time, unsigned int flags)
 {
@@ -1937,6 +1927,9 @@ static void intel_pstate_set_update_util_hook(unsigned int cpu_num)
 {
         struct cpudata *cpu = all_cpu_data[cpu_num];
 
+        if (hwp_active)
+                return;
+
         if (cpu->update_util_set)
                 return;
 
@@ -2570,7 +2563,6 @@ static int __init intel_pstate_init(void)
                 } else {
                         hwp_active++;
                         intel_pstate.attr = hwp_cpufreq_attrs;
-                        pstate_funcs.update_util = intel_pstate_update_util_hwp;
                         goto hwp_cpu_matched;
                 }
         } else {