From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: tglx@linutronix.de
Cc: linux-kernel@vger.kernel.org, Marc Zyngier <marc.zyngier@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
linux-arm-kernel@lists.infradead.org (moderated list:ARM
ARCHITECTED TIMER DRIVER)
Subject: [PATCH 14/29] arm64: arch_timer: Save cntkctl_el1 as a per-cpu variable
Date: Sun, 16 Apr 2017 22:27:04 +0200 [thread overview]
Message-ID: <1492374441-23336-14-git-send-email-daniel.lezcano@linaro.org> (raw)
In-Reply-To: <1492374441-23336-1-git-send-email-daniel.lezcano@linaro.org>
From: Marc Zyngier <marc.zyngier@arm.com>
As we're about to allow per CPU cntkctl_el1 configuration, we cannot
rely on the register value to be common when performing power
management.
Let's turn saved_cntkctl into a per-cpu variable.
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
drivers/clocksource/arm_arch_timer.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 395f5d9..5c114da 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -839,14 +839,14 @@ static int arch_timer_dying_cpu(unsigned int cpu)
}
#ifdef CONFIG_CPU_PM
-static unsigned int saved_cntkctl;
+static DEFINE_PER_CPU(unsigned long, saved_cntkctl);
static int arch_timer_cpu_pm_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
{
if (action == CPU_PM_ENTER)
- saved_cntkctl = arch_timer_get_cntkctl();
+ __this_cpu_write(saved_cntkctl, arch_timer_get_cntkctl());
else if (action == CPU_PM_ENTER_FAILED || action == CPU_PM_EXIT)
- arch_timer_set_cntkctl(saved_cntkctl);
+ arch_timer_set_cntkctl(__this_cpu_read(saved_cntkctl));
return NOTIFY_OK;
}
--
2.7.4
next prev parent reply other threads:[~2017-04-16 20:28 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-16 20:25 [GIT PULL] timers changes for 4.12 Daniel Lezcano
2017-04-16 20:26 ` [PATCH 01/29] arm64: Allow checking of a CPU-local erratum Daniel Lezcano
2017-04-16 20:26 ` [PATCH 02/29] arm64: Add CNTVCT_EL0 trap handler Daniel Lezcano
2017-04-16 20:26 ` [PATCH 03/29] arm64: Define Cortex-A73 MIDR Daniel Lezcano
2017-04-16 20:26 ` [PATCH 04/29] arm64: cpu_errata: Allow an erratum to be match for all revisions of a core Daniel Lezcano
2017-04-16 20:26 ` [PATCH 05/29] arm64: cpu_errata: Add capability to advertise Cortex-A73 erratum 858921 Daniel Lezcano
2017-04-16 20:26 ` [PATCH 06/29] arm64: arch_timer: Add infrastructure for multiple erratum detection methods Daniel Lezcano
2017-04-16 20:26 ` [PATCH 07/29] arm64: arch_timer: Add erratum handler for CPU-specific capability Daniel Lezcano
2017-04-16 20:26 ` [PATCH 08/29] arm64: arch_timer: Move arch_timer_reg_read/write around Daniel Lezcano
2017-04-16 20:26 ` [PATCH 09/29] arm64: arch_timer: Get rid of erratum_workaround_set_sne Daniel Lezcano
2017-04-16 20:27 ` [PATCH 10/29] arm64: arch_timer: Rework the set_next_event workarounds Daniel Lezcano
2017-04-16 20:27 ` [PATCH 11/29] arm64: arch_timer: Make workaround methods optional Daniel Lezcano
2017-04-16 20:27 ` [PATCH 12/29] arm64: arch_timer: Allows a CPU-specific erratum to only affect a subset of CPUs Daniel Lezcano
2017-04-16 20:27 ` [PATCH 13/29] arm64: arch_timer: Move clocksource_counter and co around Daniel Lezcano
2017-04-16 20:27 ` Daniel Lezcano [this message]
2017-04-16 20:27 ` [PATCH 15/29] arm64: arch_timer: Enable CNTVCT_EL0 trap if workaround is enabled Daniel Lezcano
2017-04-16 20:27 ` [PATCH 16/29] arm64: arch_timer: Workaround for Cortex-A73 erratum 858921 Daniel Lezcano
2017-04-16 20:27 ` [PATCH 17/29] arm64: arch_timer: Allow erratum matching with ACPI OEM information Daniel Lezcano
2017-04-16 20:27 ` [PATCH 18/29] arm64: arch_timer: Add HISILICON_ERRATUM_161010101 ACPI matching data Daniel Lezcano
2017-04-16 20:27 ` [PATCH 19/29] clocksource/drivers/orion: Read clock rate once Daniel Lezcano
2017-04-16 20:27 ` [PATCH 20/29] clocksource/drivers/orion: Add delay_timer implementation Daniel Lezcano
2017-04-16 20:27 ` [PATCH 21/29] clocksource: Add missing line break to error messages Daniel Lezcano
2017-04-24 7:45 ` Uwe Kleine-König
2017-04-16 20:27 ` [PATCH 22/29] dt-bindings: Clarify compatible property for rockchip timers Daniel Lezcano
2017-04-20 14:12 ` Rob Herring
2017-04-16 20:27 ` [PATCH 23/29] ARM: dts: rockchip: Update compatible property for rk322x timer Daniel Lezcano
2017-04-16 20:27 ` [PATCH 24/29] clocksource/drivers/rockchip_timer: Implement clocksource timer Daniel Lezcano
2017-04-16 20:27 ` [PATCH 25/29] ARM: dts: rockchip: Add timer entries to rk3188 SoC Daniel Lezcano
2017-04-16 20:27 ` [PATCH 26/29] ARM: dts: rockchip: disable arm-global-timer for rk3188 Daniel Lezcano
2017-04-16 20:27 ` [PATCH 27/29] clocksource: Augment bindings for Faraday timer Daniel Lezcano
2017-04-16 20:27 ` [PATCH 28/29] clocksource/drivers/gemini: Rename Gemini timer to Faraday Daniel Lezcano
2017-04-16 20:27 ` [PATCH 29/29] clocksource/drivers/fttmr010: Refactor to handle clock Daniel Lezcano
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