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Date: Tue, 3 Dec 2019 03:41:08 +0300 From: Dmitry Osipenko <digetx@...il.com> To: Thierry Reding <thierry.reding@...il.com>, Jonathan Hunter <jonathanh@...dia.com>, Peter De Schrijver <pdeschrijver@...dia.com>, "Rafael J. Wysocki" <rjw@...ysocki.net>, Daniel Lezcano <daniel.lezcano@...aro.org> Cc: linux-pm@...r.kernel.org, linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH v8 11/19] arm: tegra20/30: cpuidle: Remove unnecessary memory barrier There is no good justification for smp_rmb() after returning from LP2 because there are no memory operations that require SMP synchronization. Thus remove the confusing barrier. Signed-off-by: Dmitry Osipenko <digetx@...il.com> --- arch/arm/mach-tegra/cpuidle-tegra20.c | 2 -- arch/arm/mach-tegra/cpuidle-tegra30.c | 2 -- 2 files changed, 4 deletions(-) diff --git a/arch/arm/mach-tegra/cpuidle-tegra20.c b/arch/arm/mach-tegra/cpuidle-tegra20.c index 3f4c75dbb4aa..78cc424fac35 100644 --- a/arch/arm/mach-tegra/cpuidle-tegra20.c +++ b/arch/arm/mach-tegra/cpuidle-tegra20.c @@ -193,8 +193,6 @@ static int tegra20_idle_lp2_coupled(struct cpuidle_device *dev, local_fiq_enable(); - smp_rmb(); - return entered_lp2 ? index : 0; } #endif diff --git a/arch/arm/mach-tegra/cpuidle-tegra30.c b/arch/arm/mach-tegra/cpuidle-tegra30.c index a4f0add46a27..80ae64bcdf50 100644 --- a/arch/arm/mach-tegra/cpuidle-tegra30.c +++ b/arch/arm/mach-tegra/cpuidle-tegra30.c @@ -113,8 +113,6 @@ static int tegra30_idle_lp2(struct cpuidle_device *dev, local_fiq_enable(); - smp_rmb(); - return (entered_lp2) ? index : 0; } #endif -- 2.24.0
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