linux-kernel - Re: [PATCH v2 09/19] genirq: Add a new function to get IPI reverse mapping

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Date:	Mon, 30 Nov 2015 10:53:49 +0000
From:	Qais Yousef <qais.yousef@...tec.com>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	<linux-kernel@...r.kernel.org>, <jason@...edaemon.net>,
	<marc.zyngier@....com>, <jiang.liu@...ux.intel.com>,
	<ralf@...ux-mips.org>, <linux-mips@...ux-mips.org>
Subject: Re: [PATCH v2 09/19] genirq: Add a new function to get IPI reverse
 mapping

On 11/30/2015 10:40 AM, Thomas Gleixner wrote:
> On Fri, 27 Nov 2015, Qais Yousef wrote:
>> While trying to get my remoteproc driver work with this I uncovered a problem
>> with this approach.
>>
>> mips-gic doesn't store the actual hwirq in the irq_data. It uses
>> GIC_SHARED_TO_HWIRQ() and GIC_HWIRQ_TO_SHARED() to add and remove an offset.
> Why can't MIPS store the real hwirq number in irq_data?


I'm wary of ending up in inconsistency hell where some functions need to 
deal with raw hwirq and others with translated ones.

I will give this a go first and see if it gets really ugly.

Thanks,
Qais
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