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| author |   Dmitry Osipenko <digetx@gmail.com> | 2020-02-25 01:40:51 +0300 |
|---|---|---|
| committer |   Thierry Reding <treding@nvidia.com> | 2020-03-13 11:23:10 +0100 |
| commit | 650a941c341b880dae451e36dd8e47f3762a3909 (patch) | |
| tree | 6a0d0bb8413f871c67a807b501b0cd594429b557 /arch/arm/mach-tegra | |
| parent | ARM: tegra: cpuidle: Make abort_flag atomic (diff) | |
| download | linux-dev-650a941c341b880dae451e36dd8e47f3762a3909.tar.xz linux-dev-650a941c341b880dae451e36dd8e47f3762a3909.zip | |
ARM: tegra: 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.
Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Tested-by: Peter Geis <pgwipeout@gmail.com>
Tested-by: Jasper Korten <jja2000@gmail.com>
Tested-by: David Heidelberg <david@ixit.cz>
Tested-by: Nicolas Chauvet <kwizart@gmail.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra')
| -rw-r--r-- | arch/arm/mach-tegra/cpuidle-tegra20.c | 2 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/cpuidle-tegra30.c | 2 |
2 files changed, 0 insertions, 4 deletions
diff --git a/arch/arm/mach-tegra/cpuidle-tegra20.c b/arch/arm/mach-tegra/cpuidle-tegra20.c index 97cae472b097..a06a4b517fb8 100644 --- a/arch/arm/mach-tegra/cpuidle-tegra20.c +++ b/arch/arm/mach-tegra/cpuidle-tegra20.c @@ -197,8 +197,6 @@ 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 |