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intel_pstate: delete scheduler hook in HWP mode

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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>
This commit is contained in:
Len Brown 2017-06-23 22:11:53 -07:00 • committed by Rafael J. Wysocki
parent f8475cef90
commit 62611cb912
1 changed files with 3 additions and 11 deletions
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14
drivers/cpufreq/intel_pstate.c
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@ -1736,16 +1736,6 @@ static void intel_pstate_adjust_pstate(struct cpudata *cpu, int target_pstate)
fp_toint(cpu->iowait_boost * 100)); 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, static void intel_pstate_update_util_pid(struct update_util_data *data,
u64 time, unsigned int flags) 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]; struct cpudata *cpu = all_cpu_data[cpu_num];
if (hwp_active)
return;
if (cpu->update_util_set) if (cpu->update_util_set)
return; return;
@ -2570,7 +2563,6 @@ static int __init intel_pstate_init(void)
} else { } else {
hwp_active++; hwp_active++;
intel_pstate.attr = hwp_cpufreq_attrs; intel_pstate.attr = hwp_cpufreq_attrs;
pstate_funcs.update_util = intel_pstate_update_util_hwp;
goto hwp_cpu_matched; goto hwp_cpu_matched;
} }
} else { } else {