linux-kernel - [PATCH 1/3] mm/memory_hotplug: use helper zone_is_zone

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Date:   Sat, 21 Aug 2021 17:42:44 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>
CC:     <naoya.horiguchi@....com>, <mhocko@...e.com>, <minchan@...nel.org>,
        <cgoldswo@...eaurora.org>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>, <linmiaohe@...wei.com>
Subject: [PATCH 1/3] mm/memory_hotplug: use helper zone_is_zone_device() to simplify the code

Use helper zone_is_zone_device() to simplify the code and remove some
explicit CONFIG_ZONE_DEVICE codes.

Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
---
 mm/memory_hotplug.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index b287ff3d7229..d986d3791986 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -477,15 +477,13 @@ void __ref remove_pfn_range_from_zone(struct zone *zone,
 				 sizeof(struct page) * cur_nr_pages);
 	}
 
-#ifdef CONFIG_ZONE_DEVICE
 	/*
 	 * Zone shrinking code cannot properly deal with ZONE_DEVICE. So
 	 * we will not try to shrink the zones - which is okay as
 	 * set_zone_contiguous() cannot deal with ZONE_DEVICE either way.
 	 */
-	if (zone_idx(zone) == ZONE_DEVICE)
+	if (zone_is_zone_device(zone))
 		return;
-#endif
 
 	clear_zone_contiguous(zone);
 
-- 
2.23.0