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acpi_idle: Remove tracing

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All the idle routines are called with RCU disabled, as such there must
not be any tracing inside.

While there; clean-up the io-port idle thing.

Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
Tested-by: Tony Lindgren <[email protected]>
Tested-by: Ulf Hansson <[email protected]>
Acked-by: Rafael J. Wysocki <[email protected]>
Acked-by: Frederic Weisbecker <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
This commit is contained in:
Peter Zijlstra authored and Ingo Molnar committed 2023-01-13 11:48:15 +01:00
1 parent 924aed1646
commit 8ce78470bf
1 file changed
+8 -8
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drivers/acpi/processor_idle.c
+8 -8
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@@ -109,8 +109,8 @@ static const struct dmi_system_id processor_power_dmi_table[] = {
static void __cpuidle acpi_safe_halt(void)
{
if (!tif_need_resched()) {
safe_halt();
local_irq_disable();
raw_safe_halt();
raw_local_irq_disable();
}
}
@@ -523,8 +523,11 @@ static int acpi_idle_bm_check(void)
return bm_status;
}
static void wait_for_freeze(void)
static __cpuidle void io_idle(unsigned long addr)
{
/* IO port based C-state */
inb(addr);
#ifdef CONFIG_X86
/* No delay is needed if we are in guest */
if (boot_cpu_has(X86_FEATURE_HYPERVISOR))
@@ -569,9 +572,7 @@ static void __cpuidle acpi_idle_do_entry(struct acpi_processor_cx *cx)
} else if (cx->entry_method == ACPI_CSTATE_HALT) {
acpi_safe_halt();
} else {
/* IO port based C-state */
inb(cx->address);
wait_for_freeze();
io_idle(cx->address);
}
perf_lopwr_cb(false);
@@ -593,8 +594,7 @@ static int acpi_idle_play_dead(struct cpuidle_device *dev, int index)
if (cx->entry_method == ACPI_CSTATE_HALT)
safe_halt();
else if (cx->entry_method == ACPI_CSTATE_SYSTEMIO) {
inb(cx->address);
wait_for_freeze();
io_idle(cx->address);
} else
return -ENODEV;