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Subject[PATCH 1/2] cpufreq: intel_pstate: Avoid redundant initialization of local vars
Date
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

After commit 1a4fe38add8b ("cpufreq: intel_pstate: Remove max/min
fractions to limit performance") the initial value of the pstate local
variable in intel_pstate_max_within_limits() and the initial value of
the max_pstate local variable in intel_pstate_prepare_request() are
both immediately discarded, so initialize both these variables to
their target values upfront.

No intentional changes of behavior.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/cpufreq/intel_pstate.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)

Index: linux-pm/drivers/cpufreq/intel_pstate.c
===================================================================
--- linux-pm.orig/drivers/cpufreq/intel_pstate.c
+++ linux-pm/drivers/cpufreq/intel_pstate.c
@@ -1473,11 +1473,9 @@ static void intel_pstate_set_min_pstate(

static void intel_pstate_max_within_limits(struct cpudata *cpu)
{
- int pstate;
+ int pstate = max(cpu->pstate.min_pstate, cpu->max_perf_ratio);

update_turbo_state();
- pstate = intel_pstate_get_base_pstate(cpu);
- pstate = max(cpu->pstate.min_pstate, cpu->max_perf_ratio);
intel_pstate_set_pstate(cpu, pstate);
}

@@ -1715,11 +1713,9 @@ static inline int32_t get_target_pstate(

static int intel_pstate_prepare_request(struct cpudata *cpu, int pstate)
{
- int max_pstate = intel_pstate_get_base_pstate(cpu);
- int min_pstate;
+ int min_pstate = max(cpu->pstate.min_pstate, cpu->min_perf_ratio);
+ int max_pstate = max(min_pstate, cpu->max_perf_ratio);

- min_pstate = max(cpu->pstate.min_pstate, cpu->min_perf_ratio);
- max_pstate = max(min_pstate, cpu->max_perf_ratio);
return clamp_t(int, pstate, min_pstate, max_pstate);
}

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