[PATCH] ACPI: MRRM: Use for_each_populated_zone() in get_node_num()

get_node_num() iterates over the populated zones of every online node
with a nested loop. for_each_populated_zone() iterates over the same
zones in the same order.

So use for_each_populated_zone() instead and remove the unused
variable.

No functional change.

Signed-off-by: Sang-Heon Jeon <[email protected]>
---
 drivers/acpi/acpi_mrrm.c | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/drivers/acpi/acpi_mrrm.c b/drivers/acpi/acpi_mrrm.c
index e99cbda83452..83934e2aa0d4 100644
--- a/drivers/acpi/acpi_mrrm.c
+++ b/drivers/acpi/acpi_mrrm.c
@@ -36,17 +36,11 @@ static u32 mrrm_mem_entry_num;
 
 static int get_node_num(struct mrrm_mem_range_entry *e)
 {
-	unsigned int nid;
+	struct zone *zone;
 
-	for_each_online_node(nid) {
-		for (int z = 0; z < MAX_NR_ZONES; z++) {
-			struct zone *zone = NODE_DATA(nid)->node_zones + z;
-
-			if (!populated_zone(zone))
-				continue;
-			if (zone_intersects(zone, PHYS_PFN(e->base), PHYS_PFN(e->length)))
-				return zone_to_nid(zone);
-		}
+	for_each_populated_zone(zone) {
+		if (zone_intersects(zone, PHYS_PFN(e->base), PHYS_PFN(e->length)))
+			return zone_to_nid(zone);
 	}
 
 	return -ENOENT;
-- 
2.43.0