The following commit has been merged into the sched/core branch of tip: Commit-ID: 8ce78470bf2dd1d08107736e813fa62e09aa4647 Gitweb: https://git.kernel.org/tip/8ce78470bf2dd1d08107736e813fa62e09aa4647 Author: Peter Zijlstra <peterz@xxxxxxxxxxxxx> AuthorDate: Thu, 12 Jan 2023 20:43:29 +01:00 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitterDate: Fri, 13 Jan 2023 11:48:15 +01:00 acpi_idle: Remove tracing 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) <peterz@xxxxxxxxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> Tested-by: Tony Lindgren <tony@xxxxxxxxxxx> Tested-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> Acked-by: Frederic Weisbecker <frederic@xxxxxxxxxx> Link: https://lore.kernel.org/r/20230112195540.251666856@xxxxxxxxxxxxx --- drivers/acpi/processor_idle.c | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index a589cfa..48fcd28 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -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;
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