mm/hugetlb: remove obsolete bootmem cross-zone checks

Bootmem gigantic HugeTLB pages used to be validated again during
gather_bootmem_prealloc_node() and any cross-zone pages were discarded
there.

That validation is no longer needed.  Cross-zone bootmem gigantic pages
are now detected during allocation and freed before they reach the later
bootmem gathering path, so the remaining pages are already zone-valid.

Remove the obsolete cross-zone validation, invalid-page freeing, and the
associated discarded-page accounting.

Link: https://lore.kernel.org/20260612035903.2468601-17-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: David Hildenbrand <david@kernel.org>
Cc: Frank van der Linden <fvdl@google.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: Oscar Salvador <osalvador@suse.de>
Cc: Oscar Salvador (SUSE) <osalvador@kernel.org>
Cc: "Ritesh Harjani (IBM)" <ritesh.list@gmail.com>
Cc: Usama Arif <usama.arif@linux.dev>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

0 files changed, 0 insertions, 0 deletions