linux-kernel - Re: [RFC PATCH 3/3] genericirq: change ack/mask in irq_chip to take irq

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Message-ID: <4B7D9A39.4070308@kernel.org>
Date:	Thu, 18 Feb 2010 11:51:21 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	"H. Peter Anvin" <hpa@...or.com>
CC:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	linux-kernel@...r.kernel.org, Jeremy Fitzhardinge <jeremy@...p.org>
Subject: Re: [RFC PATCH 3/3] genericirq: change ack/mask in irq_chip to take
 irq_desc in addition to irq

On 02/18/2010 09:13 AM, H. Peter Anvin wrote:
> On 02/18/2010 09:04 AM, Eric W. Biederman wrote:
>>
>> May I ask why these methods and why pass both irq and desc instead of
>> just desc?
>>
>> I think in the long run passing both irq and desc through several
>> functions may incur some maintenance cost that it would be nice not to
>> pay (register pressure and increased chance of typos).
>>
> 
> Indeed; if the IRQ number is needed the function should just get it from
> desc->irq.


ok, change unsigned int irq to struct irq_desc *desc in irq_chip member...

YH
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