linux-kernel - Re: [rtc-linux] Re: [PATCH] rtc: Make rtc_update

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Message-ID: <20090423212639.7ba7cb0b@i1501.lan.towertech.it>
Date:	Thu, 23 Apr 2009 21:26:39 +0200
From:	Alessandro Zummo <alessandro.zummo@...ertech.it>
To:	David Brownell <david-b@...bell.net>
Cc:	rtc-linux@...glegroups.com, Atsushi Nemoto <anemo@....ocn.ne.jp>,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	hcegtvedt@...el.com, vapier@...too.org, rongkai.zhan@...driver.com,
	balajirrao@...nmoko.org, broonie@...nsource.wolfsonmicro.com
Subject: Re: [rtc-linux] Re: [PATCH] rtc: Make rtc_update_irq callable with
 irqs enabled

On Thu, 23 Apr 2009 12:25:01 -0700
David Brownell <david-b@...bell.net> wrote:

> >  but why rtc_update_irq should disable the IRQs? I believe
> >  it can work just fine with IRQs enabled.  
> 
> The last patch I saw was just changing from "caller must
> disable them" to "rtc_update_irq() disables them".
> 
> If you're talking about a different patch, please forward...

 no patch, just theory.

 the question is, do we need IRQs disabled when
 calling rtc_update_irq?

 and if yes, why? to prevent what?

-- 

 Best regards,

 Alessandro Zummo,
  Tower Technologies - Torino, Italy

  http://www.towertech.it

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