From: Anton Blanchard <anton@samba.org>

../include/linux/swap.h:extern int nr_swap_pages;       /* XXX: shouldn't this be ulong? --hch */

Sounds like it should be too me.  Some of the code checks for nr_swap_pages
< 0 so I made it a long instead.  I had to fix up the ppc64 show_mem() (Im
guessing there will be other trivial changes required in other 64bit archs,
I can find and fix those if you want).

I also noticed that the ppc64 show_mem() used ints to store page counts.
We can overflow that, so make them unsigned long.
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>