From: Frederic Weisbecker <frederic@kernel.org>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Frederic Weisbecker <frederic@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
"Rafael J . Wysocki" <rafael@kernel.org>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Thomas Gleixner <tglx@linutronix.de>,
Anna-Maria Behnsen <anna-maria@linutronix.de>
Subject: [PATCH 08/10] x86: Remove __current_clr_polling() from mwait_idle()
Date: Fri, 11 Aug 2023 19:00:47 +0200 [thread overview]
Message-ID: <20230811170049.308866-9-frederic@kernel.org> (raw)
In-Reply-To: <20230811170049.308866-1-frederic@kernel.org>
mwait_idle() is only ever called through by cpuidle, either from
default_idle_call() or from cpuidle_enter(). In any case
cpuidle_idle_call() sets again TIF_NR_POLLING after calling it so there
is no point for this atomic operation upon idle exit.
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
---
arch/x86/kernel/process.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 72015dba72ab..f1eb769770b1 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -918,7 +918,6 @@ static __cpuidle void mwait_idle(void)
raw_local_irq_disable();
}
}
- __current_clr_polling();
}
void select_idle_routine(const struct cpuinfo_x86 *c)
--
2.34.1
next prev parent reply other threads:[~2023-08-11 17:01 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-11 17:00 [PATCH 00/10] timers/cpuidle: Fixes and cleanups Frederic Weisbecker
2023-08-11 17:00 ` [PATCH 01/10] x86: Add a comment about the "magic" behind shadow sti before mwait Frederic Weisbecker
2023-08-11 17:44 ` Rafael J. Wysocki
2023-08-11 17:00 ` [PATCH 02/10] cpuidle: Fix CPUIDLE_FLAG_IRQ_ENABLE leaking timer reprogram Frederic Weisbecker
2023-08-11 17:35 ` Rafael J. Wysocki
2023-08-11 17:00 ` [PATCH 03/10] cpuidle: Report illegal tick stopped while polling Frederic Weisbecker
2023-08-11 17:37 ` Rafael J. Wysocki
2023-08-29 13:04 ` Frederic Weisbecker
2023-08-11 17:00 ` [PATCH 04/10] loongson: Fix idle VS timer enqueue Frederic Weisbecker
2023-08-14 2:58 ` bibo mao
2023-08-11 17:00 ` [PATCH 05/10] cpuidle: Comment about timers requirements VS idle handler Frederic Weisbecker
2023-08-11 17:38 ` Rafael J. Wysocki
2023-08-11 17:00 ` [PATCH 06/10] cpuidle: Remove unnecessary current_clr_polling_and_test() from haltpoll Frederic Weisbecker
2023-08-11 17:39 ` Rafael J. Wysocki
2023-08-11 17:00 ` [PATCH 07/10] cpuidle: Remove unnecessary current_clr_polling() on poll_idle() Frederic Weisbecker
2023-08-11 17:40 ` Rafael J. Wysocki
2023-08-11 17:00 ` Frederic Weisbecker [this message]
2023-08-11 17:40 ` [PATCH 08/10] x86: Remove __current_clr_polling() from mwait_idle() Rafael J. Wysocki
2023-08-11 17:00 ` [PATCH 09/10] x86: Remove the current_clr_polling() call upon mwait exit Frederic Weisbecker
2023-08-11 17:41 ` Rafael J. Wysocki
2023-08-11 17:00 ` [PATCH 10/10] sched/timers: Explain why idle task schedules out on remote timer enqueue Frederic Weisbecker
2023-08-11 17:43 ` Rafael J. Wysocki
2023-08-15 16:10 ` [PATCH 00/10] timers/cpuidle: Fixes and cleanups Peter Zijlstra
2023-08-29 11:28 ` Frederic Weisbecker
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