Re: interrupt handler

From: Kerenyi Gabor (
Date: Fri Aug 23 2002 - 00:45:33 EST

8/23/2002 9:17:07 PM, "Richard B. Johnson" <> wrote:

>On Fri, 23 Aug 2002, sanket rathi wrote:
>> hi,
>> Can i use spin lock in the interrupt handler for a singlre processor
>> machine. because books says u can not use locks but spin lock is some
>> thing diffrent
>> thanks in advance
>> --Sanket
>> ---------
>Interrupts default to OFF within an interrupt handler. Given this,
>why would you use a spin-lock within the ISR on a single-processor

Because he would like to write a code that can be run on a computer
with more than one CPU.

Anyway, do anybody know what kind of advantages/disadvantages I can get
if I don't disable interrupts at all in my driver? Even if I have to use a circular
buffer or anything else? Is it worth trying to find such a solution or is it
a wasted time?


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