mm/bootmem_info: remove CONFIG_HAVE_BOOTMEM_INFO_NODE

The whole infrastructure is unused now. Let's remove the config option
along with mm/bootmem_info. + include/linux/bootmem_info.h.

Link: https://lore.kernel.org/20260716-bootmem_info_part2-v2-10-4afc76c73d61@kernel.org
Signed-off-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Muchun Song <muchun.song@linux.dev>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: "Borislav Petkov (AMD)" <bp@alien8.de>
Cc: Brendan Jackman <jackmanb@google.com>
Cc: Brendan Jackman <brendan.jackman@linux.dev>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
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: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

1 files changed, 0 insertions, 89 deletions

diff --git a/include/linux/bootmem_info.h b/include/linux/bootmem_info.h
deleted file mode 100644
index 486acc612703..000000000000
--- a/include/linux/bootmem_info.h
+++ /dev/null
@@ -1,89 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __LINUX_BOOTMEM_INFO_H
-#define __LINUX_BOOTMEM_INFO_H
-
-#include <linux/mm.h>
-#include <linux/kmemleak.h>
-
-/*
- * Types for free bootmem stored in the low bits of page->private.
- */
-enum bootmem_type {
-	MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE = 1,
-	SECTION_INFO = MEMORY_HOTPLUG_MIN_BOOTMEM_TYPE,
-	MIX_SECTION_INFO,
-	NODE_INFO,
-	MEMORY_HOTPLUG_MAX_BOOTMEM_TYPE = NODE_INFO,
-};
-
-#ifdef CONFIG_HAVE_BOOTMEM_INFO_NODE
-void __init register_page_bootmem_info_node(struct pglist_data *pgdat);
-void register_page_bootmem_memmap(unsigned long section_nr, struct page *map,
-				  unsigned long nr_pages);
-
-void get_page_bootmem(unsigned long info, struct page *page,
-		enum bootmem_type type);
-void put_page_bootmem(struct page *page);
-
-static inline enum bootmem_type bootmem_type(const struct page *page)
-{
-	return (unsigned long)page->private & 0xf;
-}
-
-static inline unsigned long bootmem_info(const struct page *page)
-{
-	return (unsigned long)page->private >> 4;
-}
-
-/*
- * Any memory allocated via the memblock allocator and not via the
- * buddy will be marked reserved already in the memmap. For those
- * pages, we can call this function to free it to buddy allocator.
- */
-static inline void free_bootmem_page(struct page *page)
-{
-	enum bootmem_type type = bootmem_type(page);
-
-	if (type == SECTION_INFO || type == MIX_SECTION_INFO) {
-		VM_WARN_ON_PAGE(page_ref_count(page) != 2, page);
-		put_page_bootmem(page);
-	} else {
-		free_reserved_page(page);
-	}
-}
-#else
-static inline void register_page_bootmem_info_node(struct pglist_data *pgdat)
-{
-}
-
-static inline void register_page_bootmem_memmap(unsigned long section_nr,
-		struct page *map, unsigned long nr_pages)
-{
-}
-
-static inline void put_page_bootmem(struct page *page)
-{
-}
-
-static inline enum bootmem_type bootmem_type(const struct page *page)
-{
-	return SECTION_INFO;
-}
-
-static inline unsigned long bootmem_info(const struct page *page)
-{
-	return 0;
-}
-
-static inline void get_page_bootmem(unsigned long info, struct page *page,
-				    enum bootmem_type type)
-{
-}
-
-static inline void free_bootmem_page(struct page *page)
-{
-	free_reserved_page(page);
-}
-#endif
-
-#endif /* __LINUX_BOOTMEM_INFO_H */