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Date:	Tue, 16 Sep 2014 10:45:26 -0700 (PDT)
From:	Thomas Gleixner <>
To:	Jiang Liu <>
cc:	Benjamin Herrenschmidt <>,
	Ingo Molnar <>,
	"H. Peter Anvin" <>,
	"Rafael J. Wysocki" <>,
	Bjorn Helgaas <>,
	Randy Dunlap <>,
	Yinghai Lu <>,
	Borislav Petkov <>,
	Grant Likely <>,
	Marc Zyngier <>,
	Konrad Rzeszutek Wilk <>,
	Andrew Morton <>,
	Tony Luck <>,
	Joerg Roedel <>,
	Greg Kroah-Hartman <>,,,,,
Subject: Re: [RFC Part2 v1 02/21] genirq: Introduce helper functions to
 support stacked irq_chip

On Thu, 11 Sep 2014, Jiang Liu wrote:
> +void irq_chip_ack_parent(struct irq_data *data)
> +{
> +	data = data->parent_data;
> +	if (data && data->chip && data->chip->irq_ack)
> +		data->chip->irq_ack(data);

Why is this restricted to a single parent level and does not go down
the whole stack?


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