From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Mike Frysinger" <vapier.adi@gmail.com>
Subject: Re: local_save_flags(flags)
Date: Thu, 18 Sep 2008 17:15:38 -0400
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To: fundu_1999@yahoo.com
Cc: linux embedded <linux-embedded@vger.kernel.org>

On Thu, Sep 18, 2008 at 17:09, Fundu wrote:
>> turning off interrupts just masks them. the interrupt
>> hardware should
>> "latch" them and they fire when you reenable
>> interrupts.
>>
>> You loose track of "how many" not if any
>> happened...
>
> a follow up question,
> why do we need to save the flags then ? if the interrupt hardware would
> latch them ?
> can we not just disable all interrupts ?

you really should just read a book on the topic.  LDD3 covers these
intricacies (and a lot more), as does Essential Linux Device Drivers.
-mike