linux-kernel - [PATCH] mm: use is_zone_movable

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Date:   Tue, 26 Jul 2022 21:11:35 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     David Hildenbrand <david@...hat.com>,
        Oscar Salvador <osalvador@...e.de>,
        Andrew Morton <akpm@...ux-foundation.org>, <linux-mm@...ck.org>
CC:     Jason Wang <jasowang@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        <linux-kernel@...r.kernel.org>,
        Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: [PATCH] mm: use is_zone_movable_page() helper

Use is_zone_movable_page() helper to simplify code.

Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
 drivers/virtio/virtio_mem.c | 6 ++----
 mm/memory_hotplug.c         | 2 +-
 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/drivers/virtio/virtio_mem.c b/drivers/virtio/virtio_mem.c
index e07486f01999..0c2892ec6817 100644
--- a/drivers/virtio/virtio_mem.c
+++ b/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;
 
 	/*
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 1213d0c67a53..0f5914964a32 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -936,7 +936,7 @@ 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;
 		}
-- 
2.35.3