mm: use is_zone_movable_page() helper

Use is_zone_movable_page() helper to simplify code.

Link: https://lkml.kernel.org/r/20220726131135.146912-1-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta@amd.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Author: Kefeng Wang

drivers/virtio/virtio_mem.c

@@ -862,8 +862,7 @@ static void virtio_mem_sbm_notify_online(struct virtio_mem *vm,
 					 unsigned long mb_id,
 					 unsigned long start_pfn)
 {
-	const bool is_movable = page_zonenum(pfn_to_page(start_pfn)) ==
-				ZONE_MOVABLE;
+	const bool is_movable = is_zone_movable_page(pfn_to_page(start_pfn));
 	int new_state;
 
 	switch (virtio_mem_sbm_get_mb_state(vm, mb_id)) {
@@ -1158,8 +1157,7 @@ static void virtio_mem_fake_online(unsigned long pfn, unsigned long nr_pages)
  */
 static int virtio_mem_fake_offline(unsigned long pfn, unsigned long nr_pages)
 {
-	const bool is_movable = page_zonenum(pfn_to_page(pfn)) ==
-				ZONE_MOVABLE;
+	const bool is_movable = is_zone_movable_page(pfn_to_page(pfn));
 	int rc, retry_count;
 
 	/*

mm/memory_hotplug.c

@@ -932,7 +932,7 @@ static struct zone *auto_movable_zone_for_pfn(int nid,
 			if (!page)
 				continue;
 			/* If anything is !MOVABLE online the rest !MOVABLE. */
-			if (page_zonenum(page) != ZONE_MOVABLE)
+			if (!is_zone_movable_page(page))
 				goto kernel_zone;
 			online_pages += PAGES_PER_SECTION;
 		}