Re: [RFC PATCH v6 2/3] arm64: fix a migrating irq bug when hotplug cpu

[Catalin Marinas]

On Thu, Sep 24, 2015 at 05:32:14PM +0800, Yang Yingliang wrote:
> 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@xxxxxxxxxxxxxxx>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Marc Zyngier <marc.zyngier@xxxxxxx>
> Cc: Mark Rutland <mark.rutland@xxxxxxx>
> Cc: Will Deacon <will.deacon@xxxxxxx>
> Cc: Russell King - ARM Linux <linux@xxxxxxxxxxxxxxxx>
> Cc: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
> Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>

I queued this patch for 4.4, on top of this branch from Thomas:

  git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq/for-arm

The arm (32-bit) patch would need to go via Russell's tree (patch
system, pull request or waiting until 4.4-rc1, it's up to Russell).

Thanks.

-- 
Catalin
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