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ACPI / cpuidle: Merge acpi_idle_enter_c1() and acpi_idle_enter_simple()

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acpi_idle_enter_c1() and acpi_idle_enter_simple() are close enough to
each other that they can be merged into one function which reduces
duplication of code quite a bit.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki 2015-02-03 21:54:48 +01:00
parent 2a73835291
commit d2cecb3d66
1 changed files with 6 additions and 37 deletions
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43
drivers/acpi/processor_idle.c
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@ -703,34 +703,6 @@ static void acpi_idle_do_entry(struct acpi_processor_cx *cx)
} }
} }
/**
* acpi_idle_enter_c1 - enters an ACPI C1 state-type
* @dev: the target CPU
* @drv: cpuidle driver containing cpuidle state info
* @index: index of target state
*
* This is equivalent to the HALT instruction.
*/
static int acpi_idle_enter_c1(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index)
{
struct acpi_processor *pr;
struct acpi_processor_cx *cx = per_cpu(acpi_cstate[index], dev->cpu);
pr = __this_cpu_read(processors);
if (unlikely(!pr))
return -EINVAL;
lapic_timer_state_broadcast(pr, cx, 1);
acpi_idle_do_entry(cx);
lapic_timer_state_broadcast(pr, cx, 0);
return index;
}
/** /**
* acpi_idle_play_dead - enters an ACPI state for long-term idle (i.e. off-lining) * acpi_idle_play_dead - enters an ACPI state for long-term idle (i.e. off-lining)
* @dev: the target CPU * @dev: the target CPU
@ -766,7 +738,7 @@ static bool acpi_idle_fallback_to_c1(struct acpi_processor *pr)
} }
/** /**
* acpi_idle_enter_simple - enters an ACPI state without BM handling * acpi_idle_enter_simple - enters a CPU idle state without BM handling
* @dev: the target CPU * @dev: the target CPU
* @drv: cpuidle driver with cpuidle state information * @drv: cpuidle driver with cpuidle state information
* @index: the index of suggested state * @index: the index of suggested state
@ -782,8 +754,10 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
if (unlikely(!pr)) if (unlikely(!pr))
return -EINVAL; return -EINVAL;
if (acpi_idle_fallback_to_c1(pr)) if (cx->type != ACPI_STATE_C1 && acpi_idle_fallback_to_c1(pr)) {
return acpi_idle_enter_c1(dev, drv, CPUIDLE_DRIVER_STATE_START); index = CPUIDLE_DRIVER_STATE_START;
cx = per_cpu(acpi_cstate[index], dev->cpu);
}
lapic_timer_state_broadcast(pr, cx, 1); lapic_timer_state_broadcast(pr, cx, 1);
@ -819,7 +793,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
return -EINVAL; return -EINVAL;
if (acpi_idle_fallback_to_c1(pr)) if (acpi_idle_fallback_to_c1(pr))
return acpi_idle_enter_c1(dev, drv, CPUIDLE_DRIVER_STATE_START); return acpi_idle_enter_simple(dev, drv, CPUIDLE_DRIVER_STATE_START);
if (!cx->bm_sts_skip && acpi_idle_bm_check()) { if (!cx->bm_sts_skip && acpi_idle_bm_check()) {
if (drv->safe_state_index >= 0) { if (drv->safe_state_index >= 0) {
@ -967,11 +941,6 @@ static int acpi_processor_setup_cpuidle_states(struct acpi_processor *pr)
switch (cx->type) { switch (cx->type) {
case ACPI_STATE_C1: case ACPI_STATE_C1:
state->enter = acpi_idle_enter_c1;
state->enter_dead = acpi_idle_play_dead;
drv->safe_state_index = count;
break;
case ACPI_STATE_C2: case ACPI_STATE_C2:
state->enter = acpi_idle_enter_simple; state->enter = acpi_idle_enter_simple;
state->enter_dead = acpi_idle_play_dead; state->enter_dead = acpi_idle_play_dead;