linux-kernel - [PATCH v3 3/8] mm/slub.c: use hotplug_memory

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Message-ID: <20220922141904.3245505-4-liushixin2@huawei.com>
Date:   Thu, 22 Sep 2022 22:18:59 +0800
From:   Liu Shixin <liushixin2@...wei.com>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>,
        Waiman Long <longman@...hat.com>,
        Zefan Li <lizefan.x@...edance.com>,
        Christoph Lameter <cl@...ux.com>
CC:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        Liu Shixin <liushixin2@...wei.com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>
Subject: [PATCH v3 3/8] mm/slub.c: 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/slub.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
index 234bf0e44262..9a0853e01fd7 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -4698,11 +4698,6 @@ static int slab_memory_callback(struct notifier_block *self,
 	return ret;
 }
 
-static struct notifier_block slab_memory_callback_nb = {
-	.notifier_call = slab_memory_callback,
-	.priority = SLAB_CALLBACK_PRI,
-};
-
 /********************************************************************
  *			Basic setup of slabs
  *******************************************************************/
@@ -4768,7 +4763,7 @@ void __init kmem_cache_init(void)
 	create_boot_cache(kmem_cache_node, "kmem_cache_node",
 		sizeof(struct kmem_cache_node), SLAB_HWCACHE_ALIGN, 0, 0);
 
-	register_hotmemory_notifier(&slab_memory_callback_nb);
+	hotplug_memory_notifier(slab_memory_callback, SLAB_CALLBACK_PRI);
 
 	/* Able to allocate the per node structures */
 	slab_state = PARTIAL;
-- 
2.25.1