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authorTony Lindgren <tony@atomide.com>2021-01-10 21:09:11 +0200
committerTony Lindgren <tony@atomide.com>2021-01-15 12:48:07 +0200
commit06862d789ddde8a99c1e579e934ca17c15a84755 (patch)
tree8b2bb845d30e651946f548a805e3e63075152a19 /arch/arm/boot/dts/tegra30-asus-nexus7-grouper-maxim-pmic.dtsi
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ARM: OMAP2+: Fix suspcious RCU usage splats for omap_enter_idle_coupled
We get suspcious RCU usage splats with cpuidle in several places in omap_enter_idle_coupled() with the kernel debug options enabled: RCU used illegally from extended quiescent state! ... (_raw_spin_lock_irqsave) (omap_enter_idle_coupled+0x17c/0x2d8) (omap_enter_idle_coupled) (cpuidle_enter_state) (cpuidle_enter_state_coupled) (cpuidle_enter) Let's use RCU_NONIDLE to suppress these splats. Things got changed around with commit 1098582a0f6c ("sched,idle,rcu: Push rcu_idle deeper into the idle path") that started triggering these warnings. For the tick_broadcast related calls, ideally we'd just switch over to using CPUIDLE_FLAG_TIMER_STOP for omap_enter_idle_coupled() to have the generic cpuidle code handle the tick_broadcast related calls for us and then just drop the tick_broadcast calls here. But we're currently missing the call in the common cpuidle code for tick_broadcast_enable() that CPU1 hotplug needs as described in earlier commit 50d6b3cf9403 ("ARM: OMAP2+: fix lack of timer interrupts on CPU1 after hotplug"). Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Paul E. McKenney <paulmck@kernel.org> Cc: Russell King <rmk+kernel@armlinux.org.uk> Acked-by: Paul E. McKenney <paulmck@kernel.org> Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/boot/dts/tegra30-asus-nexus7-grouper-maxim-pmic.dtsi')
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