[PATCH 0/8] mm: remove CONFIG_HAVE_BOOTMEM_INFO_NODE (Part 1)

["David Hildenbrand (Arm)" <david@kernel.org>]

We want to remove CONFIG_HAVE_BOOTMEM_INFO_NODE. As a first step,
let's limit the remaining harm to x86 and core code, removing
sparc, ppc and s390 leftovers, starting the stepwise removal by removing
and simplifying some code.

Once a related x86 vmemmap fix [1] is in, we can merge part 2 that will
remove CONFIG_HAVE_BOOTMEM_INFO_NODE entirely.

Tested on x86-64 with hugetlb vmemmap optimization in combination with
KMEMLEAK, making sure that the problem reported in dd0ff4d12dd2 ("bootmem:
remove the vmemmap pages from kmemleak in put_page_bootmem") does not
reappear -- hoping I managed to trigger the original problem.

Heavily cross-compiled, but let's let build bots run on it for a bit.

[1] https://lore.kernel.org/r/20260429-vmemmap-v2-1-8dfcacffd877@kernel.org 

Signed-off-by: David Hildenbrand (Arm) <david@kernel.org>
---
David Hildenbrand (Arm) (8):
      sparc/mm: remove register_page_bootmem_info()
      mm/bootmem_info: drop initialization of page->lru
      mm/bootmem_info: stop using PG_private
      mm/bootmem_info: remove call to kmemleak_free_part_phys()
      mm/bootmem_info: stop marking the pgdat as NODE_INFO
      mm/bootmem_info: stop marking mem_section_usage as MIX_SECTION_INFO
      s390/mm: use free_reserved_page() in vmem_free_pages()
      powerpc/mm: remove CONFIG_HAVE_BOOTMEM_INFO_NODE

 arch/powerpc/mm/init_64.c    |  8 --------
 arch/s390/mm/vmem.c          |  3 +--
 arch/sparc/mm/init_64.c      | 20 --------------------
 include/linux/bootmem_info.h |  1 -
 mm/Kconfig                   |  2 +-
 mm/bootmem_info.c            | 25 ++-----------------------
 6 files changed, 4 insertions(+), 55 deletions(-)

---

base-commit: e9dd96806dbc2d50a66770b6a86962bd5d601153

change-id: 20260511-bootmem_info_prep-bfc0e7a5b87e

--

Cheers,

David