From f1e0bb0ad473a32d1b7e6d285ae9f7e47710bb5e Mon Sep 17 00:00:00 2001 From: Yang Yingliang Date: Thu, 24 Sep 2015 17:32:13 +0800 Subject: genirq: Introduce generic irq migration for cpu hotunplug ARM and ARM64 have almost identical code for migrating interrupts on cpu hotunplug. Provide a generic version which can be used by both. The new code addresses a shortcoming in the ARM[64] variants which fails to update the affinity change in some cases. The solution for this is to use the core function irq_do_set_affinity() instead of open coding it. [ tglx: Added copyright notice and license boilerplate. Rewrote subject and changelog. ] Signed-off-by: Yang Yingliang Acked-by: Russell King - ARM Linux Cc: Jiang Liu Cc: Marc Zyngier Cc: Mark Rutland Cc: Will Deacon Cc: Hanjun Guo Cc: Link: http://lkml.kernel.org/r/1443087135-17044-2-git-send-email-yangyingliang@huawei.com Signed-off-by: Thomas Gleixner --- kernel/irq/Kconfig | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'kernel/irq/Kconfig') diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig index 9a76e3beda54..3b48dab80164 100644 --- a/kernel/irq/Kconfig +++ b/kernel/irq/Kconfig @@ -30,6 +30,10 @@ config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ config GENERIC_PENDING_IRQ bool +# Support for generic irq migrating off cpu before the cpu is offline. +config GENERIC_IRQ_MIGRATION + bool + # Alpha specific irq affinity mechanism config AUTO_IRQ_AFFINITY bool -- cgit v1.2.3