[PATCH 3/4] intel_pstate: delete scheduler hook in HWP mode

[Len Brown]

From: Len Brown <len.br...@intel.com>

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.br...@intel.com>
---
 drivers/cpufreq/intel_pstate.c | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index b7de5bd..4ec5668 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -1732,16 +1732,6 @@ 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)
 {
@@ -1933,6 +1923,9 @@ 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;
 
@@ -2557,7 +2550,6 @@ 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 {
-- 
2.7.4