[PATCH 11/36] cpuidle,armada: Push RCU-idle into driver

, Arnd Bergmann [off-list ref], ulli.kroll@googlemail.com, vgupta@kernel.org, linux-clk@vger.kernel.org, josh@joshtriplett.org, rostedt@goodmis.org, rcu@vger.kernel.org, bp@alien8.de, bcain@quicinc.com, tsbogend@alpha.franken.de, linux-parisc@vger.kernel.org, sudeep.holla@arm.com, shawnguo@kernel.org, davem@davemloft.net, dalias@libc.org, tony@atomide.com, amakhalov@vmware.com, bjorn.andersson@linaro.org, hpa@zytor.com, sparclinux@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-riscv@lists.infradead.org, anton.ivanov@cambridgegreys.com, jonas@southpole.se, yury.norov@gmail.com, richard@nod.at, x86@kernel.org, linux@armlinux.org.uk, mingo@redhat.com, aou@eecs.berkeley.edu, paulmck@kernel.org, hca@linux.ibm.com, stefan.kristiansson@saunalahti.fi, openrisc@lists.librecores.org, paul.walmsley@sifive.com, linux-tegra@vger.kernel.org, namhyung@kernel.org, andriy.shevchenko@linux.intel.com, jpoimboe@kernel.org, jgross@suse.com, monstr@monstr.eu, linux-mips@vger.kernel.org, palmer@dab
 belt.com, anup@brainfault.org, ink@jurassic.park.msu.ru, johannes@sipsolutions.net, linuxppc-dev@lists.ozlabs.org
Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org
Sender: "Linuxppc-dev" [off-list ref]

Doing RCU-idle outside the driver, only to then temporarily enable it
again before going idle is daft.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
 drivers/cpuidle/cpuidle-mvebu-v7.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/drivers/cpuidle/cpuidle-mvebu-v7.c
+++ b/drivers/cpuidle/cpuidle-mvebu-v7.c

@@ -36,7 +36,10 @@ static int mvebu_v7_enter_idle(struct cp
 	if (drv->states[index].flags & MVEBU_V7_FLAG_DEEP_IDLE)
 		deepidle = true;
 
+	rcu_idle_enter();
 	ret = mvebu_v7_cpu_suspend(deepidle);
+	rcu_idle_exit();
+
 	cpu_pm_exit();
 
 	if (ret)

@@ -49,6 +52,7 @@ static struct cpuidle_driver armadaxp_id
 	.name			= "armada_xp_idle",
 	.states[0]		= ARM_CPUIDLE_WFI_STATE,
 	.states[1]		= {
+		.flags			= CPUIDLE_FLAG_RCU_IDLE,
 		.enter			= mvebu_v7_enter_idle,
 		.exit_latency		= 100,
 		.power_usage		= 50,

@@ -57,6 +61,7 @@ static struct cpuidle_driver armadaxp_id
 		.desc			= "CPU power down",
 	},
 	.states[2]		= {
+		.flags			= CPUIDLE_FLAG_RCU_IDLE,
 		.enter			= mvebu_v7_enter_idle,
 		.exit_latency		= 1000,
 		.power_usage		= 5,

@@ -72,6 +77,7 @@ static struct cpuidle_driver armada370_i
 	.name			= "armada_370_idle",
 	.states[0]		= ARM_CPUIDLE_WFI_STATE,
 	.states[1]		= {
+		.flags			= CPUIDLE_FLAG_RCU_IDLE,
 		.enter			= mvebu_v7_enter_idle,
 		.exit_latency		= 100,
 		.power_usage		= 5,

@@ -87,6 +93,7 @@ static struct cpuidle_driver armada38x_i
 	.name			= "armada_38x_idle",
 	.states[0]		= ARM_CPUIDLE_WFI_STATE,
 	.states[1]		= {
+		.flags			= CPUIDLE_FLAG_RCU_IDLE,
 		.enter			= mvebu_v7_enter_idle,
 		.exit_latency		= 10,
 		.power_usage		= 5,