mm/hugetlb: remove unused bootmem cma field

struct huge_bootmem_page no longer needs to keep the CMA pointer.  The
bootmem path only needs to remember whether a huge page came from CMA,
which is already encoded in the flags field.

Set HUGE_BOOTMEM_CMA when the page is allocated, drop the unused cma field
together with the redundant assignments, and simplify the early CMA
bootmem allocation fallback path now that the cma pointer no longer has to
be stored in struct huge_bootmem_page.

Link: https://lore.kernel.org/20260612035903.2468601-19-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
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: Mike Rapoport (Microsoft) <rppt@kernel.org>
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