mm/mm_init.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/20220923033347.3935160-6-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/mm_init.c b/mm/mm_init.c
index 0d7b2bd..44aadc1 100644 (file)
--- a/mm/mm_init.c
+++ b/mm/mm_init.c
@@ -178,16 +178,10 @@ static int __meminit mm_compute_batch_notifier(struct notifier_block *self,
        return NOTIFY_OK;
 }
 
-static struct notifier_block compute_batch_nb __meminitdata = {
-       .notifier_call = mm_compute_batch_notifier,
-       .priority = IPC_CALLBACK_PRI, /* use lowest priority */
-};
-
 static int __init mm_compute_batch_init(void)
 {
        mm_compute_batch(sysctl_overcommit_memory);
-       register_hotmemory_notifier(&compute_batch_nb);
-
+       hotplug_memory_notifier(mm_compute_batch_notifier, IPC_CALLBACK_PRI);
        return 0;
 }