linux-kernel - [PATCH 4/9] mm/mmap: use hotplug_memory

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Message-ID: <20220919083152.1824305-5-liushixin2@huawei.com>
Date:   Mon, 19 Sep 2022 16:31:47 +0800
From:   Liu Shixin <liushixin2@...wei.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
CC:     <linux-kernel@...r.kernel.org>, Liu Shixin <liushixin2@...wei.com>,
        "Kefeng Wang" <wangkefeng.wang@...wei.com>
Subject: [PATCH 4/9] mm/mmap: use hotplug_memory_notifier() directly

Since patch 316346243be6 has already updated the minimum gcc version to 5.1.
The previous problem mentioned in patch f02c69680088 is not existed. So we
can now revert to use hotplug_memory_notifier() directly rather than
register_hotmemory_notifier().

Signed-off-by: Liu Shixin <liushixin2@...wei.com>
---
 mm/mmap.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index 6445fd386f04..87ec40e00e2a 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -3745,13 +3745,9 @@ static int reserve_mem_notifier(struct notifier_block *nb,
 	return NOTIFY_OK;
 }
 
-static struct notifier_block reserve_mem_nb = {
-	.notifier_call = reserve_mem_notifier,
-};
-
 static int __meminit init_reserve_notifier(void)
 {
-	if (register_hotmemory_notifier(&reserve_mem_nb))
+	if (hotplug_memory_notifier(&reserve_mem_notifier, 0))
 		pr_err("Failed registering memory add/remove notifier for admin reserve\n");
 
 	return 0;
-- 
2.25.1