mm/slub.c: use hotplug_memory_notifier() directly

Commit 76ae847497bc52 ("Documentation: raise minimum supported version of
GCC to 5.1") updated the minimum gcc version to 5.1.  So the problem
mentioned in f02c69680088 ("include/linux/memory.h: implement
register_hotmemory_notifier()") no longer exist.  So we can now switch to
use hotplug_memory_notifier() directly rather than
register_hotmemory_notifier().

Link: https://lkml.kernel.org/r/20220923033347.3935160-4-liushixin2@huawei.com
Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Waiman Long <longman@redhat.com>
Cc: zefan li <lizefan.x@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/slub.c b/mm/slub.c
index 157527d7101be0da54026376ff4f4095deb9ec2d..f37e6a51e23335858c9d22851b72bc13876760e8 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -4771,11 +4771,6 @@ 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
  *******************************************************************/
@@ -4841,7 +4836,7 @@ 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;