From: Patryk Wlazlyn <patryk.wlazlyn@linux.intel.com>
To: x86@kernel.org
Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
rafael.j.wysocki@intel.com, len.brown@intel.com,
artem.bityutskiy@linux.intel.com, dave.hansen@linux.intel.com,
patryk.wlazlyn@linux.intel.com, peterz@infradead.org,
tglx@linutronix.de, gautham.shenoy@amd.com
Subject: [RFC PATCH v4 3/8] ACPI: processor_idle: Use acpi_idle_play_dead() for all C-states
Date: Mon, 25 Nov 2024 14:20:23 +0100 [thread overview]
Message-ID: <20241125132029.7241-4-patryk.wlazlyn@linux.intel.com> (raw)
In-Reply-To: <20241125132029.7241-1-patryk.wlazlyn@linux.intel.com>
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Notice that acpi_processor_setup_cstates() can set state->enter_dead to acpi_idle_play_dead() for all C-states unconditionally and remove the
confusing C-state type check done before setting it.
No intentional functional impact.
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Tested-by: Mario Limonciello <mario.limonciello@amd.com> # 6.12-rc7
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
drivers/acpi/processor_idle.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index ce728cf7e301..698897b29de2 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -800,12 +800,12 @@ static int acpi_processor_setup_cstates(struct acpi_processor *pr)
state->enter = acpi_idle_enter;
state->flags = 0;
- if (cx->type == ACPI_STATE_C1 || cx->type == ACPI_STATE_C2 ||
- cx->type == ACPI_STATE_C3) {
- state->enter_dead = acpi_idle_play_dead;
- if (cx->type != ACPI_STATE_C3)
- drv->safe_state_index = count;
- }
+
+ state->enter_dead = acpi_idle_play_dead;
+
+ if (cx->type == ACPI_STATE_C1 || cx->type == ACPI_STATE_C2)
+ drv->safe_state_index = count;
+
/*
* Halt-induced C1 is not good for ->enter_s2idle, because it
* re-enables interrupts on exit. Moreover, C1 is generally not
--
2.47.0
next prev parent reply other threads:[~2024-11-25 13:20 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-25 13:20 [RFC PATCH v4 0/8] SRF: Fix offline CPU preventing pc6 entry Patryk Wlazlyn
2024-11-25 13:20 ` [RFC PATCH v4 1/8] cpuidle: Do not return from cpuidle_play_dead() on callback failures Patryk Wlazlyn
2024-11-25 13:26 ` Rafael J. Wysocki
2024-11-25 14:36 ` Patryk Wlazlyn
2024-11-25 13:20 ` [RFC PATCH v4 2/8] cpuidle: Change :enter_dead() driver callback return type to void Patryk Wlazlyn
2024-11-25 13:20 ` Patryk Wlazlyn [this message]
2024-11-25 13:24 ` [RFC PATCH v4 3/8] ACPI: processor_idle: Use acpi_idle_play_dead() for all C-states Rafael J. Wysocki
2024-11-25 14:39 ` Patryk Wlazlyn
2024-11-25 14:36 ` Gautham R. Shenoy
2024-11-25 13:20 ` [RFC PATCH v4 4/8] x86/smp: Allow calling mwait_play_dead with arbitrary hint Patryk Wlazlyn
2024-11-25 14:39 ` Rafael J. Wysocki
2024-11-26 11:36 ` Patryk Wlazlyn
2024-11-26 11:45 ` Rafael J. Wysocki
2024-11-25 13:20 ` [RFC PATCH v4 5/8] x86/smp native_play_dead: Prefer cpuidle_play_dead() over mwait_play_dead() Patryk Wlazlyn
2024-11-25 13:45 ` Peter Zijlstra
2024-11-25 13:56 ` Rafael J. Wysocki
2024-11-25 14:43 ` Patryk Wlazlyn
2024-11-25 14:48 ` Rafael J. Wysocki
2024-11-26 11:56 ` Patryk Wlazlyn
2024-11-26 12:04 ` Rafael J. Wysocki
2024-11-26 13:10 ` Patryk Wlazlyn
2024-11-26 13:38 ` Rafael J. Wysocki
2024-11-25 13:20 ` [RFC PATCH v4 6/8] intel_idle: Provide enter_dead() handler for SRF Patryk Wlazlyn
2024-11-25 13:44 ` Rafael J. Wysocki
2024-11-25 14:48 ` Patryk Wlazlyn
2024-11-25 14:50 ` Rafael J. Wysocki
2024-11-25 13:53 ` Peter Zijlstra
2024-11-25 13:58 ` Rafael J. Wysocki
2024-11-25 14:12 ` Peter Zijlstra
2024-11-25 14:19 ` Rafael J. Wysocki
2024-11-25 13:20 ` [RFC PATCH v4 7/8] acpi_idle: Add FFH cstate handling Patryk Wlazlyn
2024-11-25 13:41 ` Rafael J. Wysocki
2024-11-25 14:00 ` Rafael J. Wysocki
2024-11-25 15:14 ` Gautham R. Shenoy
2024-11-26 12:03 ` Patryk Wlazlyn
2024-11-25 13:20 ` [RFC PATCH v4 8/8] acpi_idle: Disallow play_dead with FFH cstate on AMD platforms Patryk Wlazlyn
2024-11-25 13:46 ` Rafael J. Wysocki
2024-11-25 13:54 ` Peter Zijlstra
2024-11-25 14:56 ` Patryk Wlazlyn
2024-11-25 15:17 ` Gautham R. Shenoy
2024-11-25 15:15 ` Gautham R. Shenoy
2024-11-26 12:05 ` Patryk Wlazlyn
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