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| author | Yang Yingliang <yangyingliang@huawei.com> | 2015-09-24 17:32:14 +0800 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2015-10-09 17:40:35 +0100 |
| commit | 217d453d473c5ddfd140a06bf9d8575218551020 (patch) | |
| tree | 7cc69c16b02e64faf46344e0f4e6cb3afa43ac7c /arch/arm64/Kconfig | |
| parent | a78afccbbaa6d2df49768cabad8af28a0a84181d (diff) | |
| download | linux-217d453d473c5ddfd140a06bf9d8575218551020.tar.gz linux-217d453d473c5ddfd140a06bf9d8575218551020.tar.bz2 linux-217d453d473c5ddfd140a06bf9d8575218551020.zip | |
arm64: fix a migrating irq bug when hotplug cpu
When cpu is disabled, all irqs will be migratged to another cpu.
In some cases, a new affinity is different, the old affinity need
to be updated and if irq_set_affinity's return value is IRQ_SET_MASK_OK_DONE,
the old affinity can not be updated. Fix it by using irq_do_set_affinity.
And migrating interrupts is a core code matter, so use the generic
function irq_migrate_all_off_this_cpu() to migrate interrupts in
kernel/irq/migration.c.
Cc: Jiang Liu <jiang.liu@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Hanjun Guo <hanjun.guo@linaro.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig')
| -rw-r--r-- | arch/arm64/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 98b4f98a13de..1b35bdbd5d74 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -427,6 +427,7 @@ config NR_CPUS config HOTPLUG_CPU bool "Support for hot-pluggable CPUs" + select GENERIC_IRQ_MIGRATION help Say Y here to experiment with turning CPUs off and on. CPUs can be controlled through /sys/devices/system/cpu. |