MAINTAINERS: add core mm section

In furtherance of ongoing efforts to ensure people are aware of who
de-facto maintains/has an interest in specific parts of mm, as well trying
to avoid get_maintainers.pl listing only Andrew and the mailing list for
mm files - establish a 'core' memory management section establishing David
as co-maintainer alongside Andrew (thanks David for volunteering!) along
with a number of relevant reviewers.

We try to keep things as fine-grained as possible, so we place only
obviously 'general' mm things here.  For files which are specific to a
particular part of mm, we prefer new entries.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Lorenzo Stoakes <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Acked-by: Vlastimil Babka <[email protected]>
Acked-by: Mike Rapoport (Microsoft) <[email protected]>
Acked-by: Liam R. Howlett <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Cc: Lorenzo Stoakes <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: lorenzo-stoakes

MAINTAINERS

@@ -15494,14 +15494,11 @@ F:	Documentation/mm/
 F:	include/linux/gfp.h
 F:	include/linux/gfp_types.h
 F:	include/linux/memfd.h
-F:	include/linux/memory.h
 F:	include/linux/memory_hotplug.h
 F:	include/linux/memory-tiers.h
 F:	include/linux/mempolicy.h
 F:	include/linux/mempool.h
 F:	include/linux/memremap.h
-F:	include/linux/mm.h
-F:	include/linux/mm_*.h
 F:	include/linux/mmzone.h
 F:	include/linux/mmu_notifier.h
 F:	include/linux/pagewalk.h
@@ -15511,6 +15508,31 @@ F:	tools/mm/
 F:	tools/testing/selftests/mm/
 N:	include/linux/page[-_]*
 
+MEMORY MANAGEMENT - CORE
+M:	Andrew Morton <[email protected]>
+M:	David Hildenbrand <[email protected]>
+R:	Lorenzo Stoakes <[email protected]>
+R:	Liam R. Howlett <[email protected]>
+R:	Vlastimil Babka <[email protected]>
+R:	Mike Rapoport <[email protected]>
+R:	Suren Baghdasaryan <[email protected]>
+R:	Michal Hocko <[email protected]>
+L:	[email protected]
+S:	Maintained
+W:	http://www.linux-mm.org
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
+F:	include/linux/memory.h
+F:	include/linux/mm.h
+F:	include/linux/mm_*.h
+F:	include/linux/mmdebug.h
+F:	include/linux/pagewalk.h
+F:	mm/Kconfig
+F:	mm/debug.c
+F:	mm/init-mm.c
+F:	mm/memory.c
+F:	mm/pagewalk.c
+F:	mm/util.c
+
 MEMORY MANAGEMENT - EXECMEM
 M:	Andrew Morton <[email protected]>
 M:	Mike Rapoport <[email protected]>