MAINTAINERS: add MM subsection for the page allocator

Add a subsection for the page allocator, including compaction as it's
crucial for high-order allocations and works together with the
anti-fragmentation features.  Add reviewers (including myself) who
voluteered.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Vlastimil Babka <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Acked-by: Zi Yan <[email protected]>
Acked-by: Brendan Jackman <[email protected]>
Acked-by: Johannes Weiner <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Cc: Christoph Lameter (Ampere) <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Harry Yoo <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: Roman Gushchin <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: tehcaster

MAINTAINERS

@@ -15516,6 +15516,21 @@ F:	mm/numa.c
 F:	mm/numa_emulation.c
 F:	mm/numa_memblks.c
 
+MEMORY MANAGEMENT - PAGE ALLOCATOR
+M:	Andrew Morton <[email protected]>
+R:	Vlastimil Babka <[email protected]>
+R:	Suren Baghdasaryan <[email protected]>
+R:	Michal Hocko <[email protected]>
+R:	Brendan Jackman <[email protected]>
+R:	Johannes Weiner <[email protected]>
+R:	Zi Yan <[email protected]>
+L:	[email protected]
+S:	Maintained
+F:	mm/compaction.c
+F:	mm/page_alloc.c
+F:	include/linux/gfp.h
+F:	include/linux/compaction.h
+
 MEMORY MANAGEMENT - SECRETMEM
 M:	Andrew Morton <[email protected]>
 M:	Mike Rapoport <[email protected]>