[PATCH 2/3] migrate: Optimise alloc_migration_target()

["Matthew Wilcox (Oracle)" <willy@infradead.org>]

Extract the zone number directly from the folio instead of using the
folio's zone number to look up the zone and asking the zone what its
number is.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 mm/migrate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index c0e9f15be2a2..cc8d71bd116c 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -2190,7 +2190,7 @@ struct folio *alloc_migration_target(struct folio *src, unsigned long private)
 		gfp_mask |= GFP_TRANSHUGE;
 		order = folio_order(src);
 	}
-	zidx = zone_idx(folio_zone(src));
+	zidx = folio_zonenum(src);
 	if (is_highmem_idx(zidx) || zidx == ZONE_MOVABLE)
 		gfp_mask |= __GFP_HIGHMEM;
 
-- 
2.47.2