[PATCH 0/3] Subject: mm/hugetlb: fix CMA handling and surplus allocation accounting

[Kaitao Cheng]

From: Kaitao Cheng <chengkaitao@xxxxxxxxxx>

This series fixes three independent HugeTLB issues reported by Sashiko,
covering CMA parameter parsing, CMA allocation state preservation, and
NR_HUGETLB accounting on allocation rollback.

Patch 1 rejects a global hugetlb_cma size following node-specific entries.
This prevents malformed input from overwriting valid per-node reservations
with an incorrectly parsed global size.

Patch 2 preserves the CMA flag when a folio is returned to the HugeTLB
pool after vmemmap restoration fails. This ensures that a subsequent free
releases the CMA allocation correctly instead of leaving its bitmap set.

Patch 3 fixes NR_HUGETLB accounting when unused surplus folios are freed
during allocation or reservation cleanup.

Kaitao Cheng (3):
  mm/hugetlb_cma: fix incorrect hugetlb_cma_size assignment on malformed
    input
  mm/hugetlb: preserve CMA flag when returning folios to the pool
  mm/hugetlb: fix NR_HUGETLB accounting for unused surplus folios

 mm/hugetlb.c     | 13 +++++++++++--
 mm/hugetlb_cma.c |  3 +++
 2 files changed, 14 insertions(+), 2 deletions(-)

-- 
2.53.0