Re: [PATCH] mm: Add kvfree_sensitive() for freeing sensitive data objects

[Matthew Wilcox]

On Mon, Apr 06, 2020 at 10:36:07AM -0400, Waiman Long wrote:
> ZERO_OR_NULL_PTR is defined in slab.h. Using it may cause some header
> file dependency problem. To guard against the possibility of 0-length
> allocation request, how about just

Why is all the kvalloc/kvfree crap in mm.h to begin with?  slab.h is
a more sensible place to put it.  I had a patch to do that once, but I
think it went stale before I posted it.