Subject: Re: kcopy()
To: Andrew Brown <>
From: Eduardo Horvath <>
List: tech-kern
Date: 12/21/2003 03:19:48
On Sat, Dec 20, 2003 at 05:32:35PM -0500, Andrew Brown wrote:

> i've got two pointers.
> one may or may not be a valid kernel pointer.  i can't tell.
> the other may be a pointer into userspace or a pointer into kernel
> space.  i can tell which kind it is, and if it's the latter, i'm
> perfectly willing to assume that it's valid.

I give up.  How can you tell if a pointer is to userspace or kernel