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From: Arnd Bergmann on 12 Apr 2010 16:50
On Monday 12 April 2010 21:24:42 Josh Triplett wrote:
> If you want to prevent people from deferencing the pointer directly, or
> from assigning it to some other pointer, you could use Sparse's
> __attribute__((noderef)) and
> __attribute__((address_space(...)).
>
> See the definitions of __user and __iomem in include/linux/compiler.h
> for instance. (And, looking at that file, now __percpu. Nice!)
>
> You'd then have to explicitly use __force at the point where you
> legitimately dereference it.

I have started a patch set for doing that a few weeks ago, still need
to pick up that work again. Are there any other patches besides this
series that I should base on top of now?

Arnd
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