[PATCH 1/1] irqchip: irq-gic: forward SGI to itself for cortex-a7 single core

[Russell King - ARM Linux]

On Mon, Aug 08, 2016 at 11:50:26AM +0100, Mark Rutland wrote:
> As Russell pointed out in [2], this is a generic infrastructure problem,
> and there are other systems where HW might not have a self-IPI. I note
> that core code already handles that in some cases, e.g. in
> generic_exec_single where we just disable interrupts and run the work
> locally rather than sending a self-IPI.
> 
> How/where exactly is this self-IPI raised? Can we follow the example of
> generic_exec_single there?

irq_work_queue_on() calls arch_send_call_function_single_ipi() with
no checks.

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