On Mon, Jul 12, 2021 at 02:40:49PM +0200, David Hildenbrand wrote:

Checkpatch complained on a follow-up patch that we are using "unsigned"
here, which defaults to "unsigned int" and checkpatch is correct.

Use "unsigned long" instead, just as we do in other places when handling
PFNs. This can bite us once we have physical addresses in the range of
multiple TB.

Fixes: e5e689302633 ("mm, memory_hotplug: display allowed zones in the preferred ordering")
Signed-off-by: David Hildenbrand <redacted>
---
 include/linux/memory_hotplug.h | 4 ++--
 mm/memory_hotplug.c            | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

I'd propose to add Cc: [off-list ref] since I actually had
the fun to try to debug something like this a couple of years ago:
6cdb18ad98a4 ("mm/vmstat: fix overflow in mod_zone_page_state()")