MAINTAINERS: add missing file to cgroup section

The page_counter files seems most appropriately placed here.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Lorenzo Stoakes <[email protected]>
Acked-by: Shakeel Butt <[email protected]>
Cc: Alistair Popple <[email protected]>
Cc: Christoph Lameter (Ampere) <[email protected]>
Cc: Dave Chinner <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Dennis Zhou <[email protected]>
Cc: Dev Jain <[email protected]>
Cc: Jann Horn <[email protected]>
Cc: Liam Howlett <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Mike Rapoport (Microsoft) <[email protected]>
Cc: Muchun Song <[email protected]>
Cc: Nico Pache <[email protected]>
Cc: Oscar Salvador <[email protected]>
Cc: Pedro Falcato <[email protected]>
Cc: Qi Zheng <[email protected]>
Cc: Roman Gushchin <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Cc: Tejun Heo <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Zi Yan <[email protected]>
Cc: Joshua Hahn <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: lorenzo-stoakes

MAINTAINERS

@@ -6163,9 +6163,11 @@ L:	[email protected]
 L:	[email protected]
 S:	Maintained
 F:	include/linux/memcontrol.h
+F:	include/linux/page_counter.h
 F:	mm/memcontrol.c
 F:	mm/memcontrol-v1.c
 F:	mm/memcontrol-v1.h
+F:	mm/page_counter.c
 F:	mm/swap_cgroup.c
 F:	samples/cgroup/*
 F:	tools/testing/selftests/cgroup/memcg_protection.m