Contigmalloc regression seen on latest 7.x and 8.x branches

[Scott Long]

Alan Cox wrote:
> 
> After looking at r159130 and the comments in the code, I don't think it 
> would be appropriate to remove the printf()s.  However, the logic that 
> determines whether printf() is called is flawed.  I believe that the 
> attached patch should eliminate the incorrect printf()s that you are 
> seeing.
> 

If this fixes the Hans' problem, then I'm quite happy with it going into
the tree.  There another pending busdma fix that I need to handle, so I
can shepherd this one in at the same time if you'd like.

Scott