mm/vmscan: use folio_migratetype() instead of get_pageblock_migratetype()

In skip_cma(), we can use folio_migratetype() to replace
get_pageblock_migratetype().

Link: https://lkml.kernel.org/r/20230825075735.52436-1-user@VERNHAO-MC1
Signed-off-by: Vern Hao <[email protected]>
Reviewed-by: David Hildenbrand <[email protected]>
Cc: Zhaoyang Huang <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

Author: Vern Hao

mm/vmscan.c

@@ -2271,7 +2271,7 @@ static bool skip_cma(struct folio *folio, struct scan_control *sc)
 {
 	return !current_is_kswapd() &&
 			gfp_migratetype(sc->gfp_mask) != MIGRATE_MOVABLE &&
-			get_pageblock_migratetype(&folio->page) == MIGRATE_CMA;
+			folio_migratetype(folio) == MIGRATE_CMA;
 }
 #else
 static bool skip_cma(struct folio *folio, struct scan_control *sc)