Re: [RFC/PATCH] doc: volatile considered evil

Randy Dunlap
2007-05-08T21:23:48Z

Jeff Garzik wrote:
> Jeremy Fitzhardinge wrote:
>> No, David means that "asm volatile (...)" is meaningful and OK to use.

I thought it was OK in readl(), writel(), etc... (and in asm),
but that's it. (and jiffies)

> In a driver? Highly unlikey it is OK. In a filesystem? Even more
> unlikely it is OK to use.
>
> The set of circumstances where 'volatile' is acceptable is very limited.
>
> You will see it used properly in the definitions of writel(), for
> example. But most drivers using 'volatile' are likely bugs.

--
~Randy
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