MAINTAINERS: add mm swap 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 swap memory management section and add relevant
maintainers/reviewers.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Lorenzo Stoakes <[email protected]>
Acked-by: Chris Li <[email protected]>
Acked-by: Kairui Song <[email protected]>
Acked-by: Kemeng Shi <[email protected]>
Acked-by: Baoquan He <[email protected]>
Acked-by: Barry Song <[email protected]>
Acked-by: Nhat Pham <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: ljskernel

MAINTAINERS

@@ -15816,6 +15816,25 @@ S:	Maintained
 F:	include/linux/secretmem.h
 F:	mm/secretmem.c
 
+MEMORY MANAGEMENT - SWAP
+M:	Andrew Morton <[email protected]>
+R:	Kemeng Shi <[email protected]>
+R:	Kairui Song <[email protected]>
+R:	Nhat Pham <[email protected]>
+R:	Baoquan He <[email protected]>
+R:	Barry Song <[email protected]>
+R:	Chris Li <[email protected]>
+L:	[email protected]
+S:	Maintained
+F:	include/linux/swap.h
+F:	include/linux/swapfile.h
+F:	include/linux/swapops.h
+F:	mm/page_io.c
+F:	mm/swap.c
+F:	mm/swap.h
+F:	mm/swap_state.c
+F:	mm/swapfile.c
+
 MEMORY MANAGEMENT - THP (TRANSPARENT HUGE PAGE)
 M:	Andrew Morton <[email protected]>
 M:	David Hildenbrand <[email protected]>