mm/bootmem_info: stop marking the pgdat as NODE_INFO

We removed the last user of NODE_INFO in commit 119c31caa59e ("mm/sparse:
remove !CONFIG_SPARSEMEM_VMEMMAP leftovers for CONFIG_MEMORY_HOTPLUG").

But it really was never used it besides for safety-checks ever since it was
introduced in commit 04753278769f ("memory hotplug: register section/node
id to free"), where we had the comment:

	5) The node information like pgdat has similar issues. But, this
	   will be able to be solved too by this.
	   (Not implemented yet, but, remembering node id in the pages.)

Of course, that never happened, and we are not planning on freeing the
node data (pgdat/pglist_data), during memory hotunplug.

So let's just stop marking the pgdat as NODE_INFO.

Link: https://lore.kernel.org/20260511-bootmem_info_prep-v1-5-3fb0be6fc688@kernel.org
Signed-off-by: David Hildenbrand (Arm) <david@kernel.org>
Acked-by: Oscar Salvador <osalvador@suse.de>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Lance Yang <lance.yang@linux.dev>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/mm/bootmem_info.c b/mm/bootmem_info.c
index 74c1116626c8c9ff8c8a91fe744258b59eb01430..cce1d560f094b3c985341357810262822540eaae 100644 (file)
--- a/mm/bootmem_info.c
+++ b/mm/bootmem_info.c
@@ -62,15 +62,8 @@ static void __init register_page_bootmem_info_section(unsigned long start_pfn)
 
 void __init register_page_bootmem_info_node(struct pglist_data *pgdat)
 {
-       unsigned long i, pfn, end_pfn, nr_pages;
+       unsigned long pfn, end_pfn;
        int node = pgdat->node_id;
-       struct page *page;
-
-       nr_pages = PAGE_ALIGN(sizeof(struct pglist_data)) >> PAGE_SHIFT;
-       page = virt_to_page(pgdat);
-
-       for (i = 0; i < nr_pages; i++, page++)
-               get_page_bootmem(node, page, NODE_INFO);
 
        pfn = pgdat->node_start_pfn;
        end_pfn = pgdat_end_pfn(pgdat);