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From:   Liu Shixin <liushixin2@huawei.com>
To:     Andrew Morton <akpm@linux-foundation.org>,
        David Hildenbrand <david@redhat.com>,
        Waiman Long <longman@redhat.com>,
        Zefan Li <lizefan.x@bytedance.com>,
        Christoph Lameter <cl@linux.com>
CC:     <linux-mm@kvack.org>, <linux-kernel@vger.kernel.org>,
        Liu Shixin <liushixin2@huawei.com>,
        Kefeng Wang <wangkefeng.wang@huawei.com>
Subject: [PATCH v4 2/8] fs/proc/kcore.c: use hotplug_memory_notifier() directly
Date:   Fri, 23 Sep 2022 11:33:41 +0800
Message-ID: <20220923033347.3935160-3-liushixin2@huawei.com>
In-Reply-To: <20220923033347.3935160-1-liushixin2@huawei.com>
References: <20220923033347.3935160-1-liushixin2@huawei.com>
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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@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
---
 fs/proc/kcore.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index dff921f7ca33..7692a360972d 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -18,7 +18,6 @@
 #include <linux/capability.h>
 #include <linux/elf.h>
 #include <linux/elfcore.h>
-#include <linux/notifier.h>
 #include <linux/vmalloc.h>
 #include <linux/highmem.h>
 #include <linux/printk.h>
@@ -638,10 +637,6 @@ static int __meminit kcore_callback(struct notifier_block *self,
 	return NOTIFY_OK;
 }
 
-static struct notifier_block kcore_callback_nb __meminitdata = {
-	.notifier_call = kcore_callback,
-	.priority = 0,
-};
 
 static struct kcore_list kcore_vmalloc;
 
@@ -694,7 +689,7 @@ static int __init proc_kcore_init(void)
 	add_modules_range();
 	/* Store direct-map area from physical memory map */
 	kcore_update_ram();
-	register_hotmemory_notifier(&kcore_callback_nb);
+	hotplug_memory_notifier(kcore_callback, 0);
 
 	return 0;
 }
-- 
2.25.1