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(h-178-174-189-39.A498.priv.bahnhof.se. [178.174.189.39]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-30be9918086sm1809511fa.54.2025.03.06.03.35.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Mar 2025 03:35:57 -0800 (PST) From: Ulf Hansson To: "Rafael J . Wysocki" , linux-pm@vger.kernel.org Cc: Len Brown , Pavel Machek , Ulf Hansson , linux-kernel@vger.kernel.org Subject: [PATCH 1/2] PM: s2idle: Drop redundant locks when entering s2idle Date: Thu, 6 Mar 2025 12:35:40 +0100 Message-ID: <20250306113549.796524-2-ulf.hansson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250306113549.796524-1-ulf.hansson@linaro.org> References: <20250306113549.796524-1-ulf.hansson@linaro.org> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 The calls to cpus_read_lock|unlock() protects us from getting CPUS hotplugged, while entering suspend-to-idle. However, when s2idle_enter() is called we should be far beyond the point when CPUs may be hotplugged. Let's therefore simplify the code and drop the use of the lock. Signed-off-by: Ulf Hansson --- kernel/power/suspend.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c index 09f8397bae15..e7aca4e40561 100644 --- a/kernel/power/suspend.c +++ b/kernel/power/suspend.c @@ -98,8 +98,6 @@ static void s2idle_enter(void) s2idle_state = S2IDLE_STATE_ENTER; raw_spin_unlock_irq(&s2idle_lock); - cpus_read_lock(); - /* Push all the CPUs into the idle loop. */ wake_up_all_idle_cpus(); /* Make the current CPU wait so it can enter the idle loop too. */ @@ -112,8 +110,6 @@ static void s2idle_enter(void) */ wake_up_all_idle_cpus(); - cpus_read_unlock(); - raw_spin_lock_irq(&s2idle_lock); out: