[PATCH v1 0/4] mm: move vma_(kernel|mmu)_pagesize() out of hugetlb.c

[David Hildenbrand (Arm)]

Looking into vma_(kernel|mmu)_pagesize(), I realized that there is one
scenario where DAX would not do the right thing when the kernel is
not compiled with hugetlb support.

Without hugetlb support, vma_(kernel|mmu)_pagesize() will always return
PAGE_SIZE instead of using the ->pagesize() result provided by dax-device
code.

Fix that by moving vma_kernel_pagesize() to core MM code, where it belongs.
I don't think this is stable material, but am not 100% sure.

Also, move vma_mmu_pagesize() while at it. Remove the unnecessary hugetlb.h
inclusion from KVM code.

Cross-compiled heavily.

Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Madhavan Srinivasan <maddy@xxxxxxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: "Christophe Leroy (CS GROUP)" <chleroy@xxxxxxxxxx>
Cc: Muchun Song <muchun.song@xxxxxxxxx>
Cc: Oscar Salvador <osalvador@xxxxxxx>
Cc: Lorenzo Stoakes <ljs@xxxxxxxxxx>
Cc: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxxxxx>
Cc: Mike Rapoport <rppt@xxxxxxxxxx>
Cc: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Jann Horn <jannh@xxxxxxxxxx>
Cc: Pedro Falcato <pfalcato@xxxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>

David Hildenbrand (Arm) (4):
  mm: move vma_kernel_pagesize() from hugetlb to mm.h
  mm: move vma_mmu_pagesize() from hugetlb to vma.c
  KVM: remove hugetlb.h inclusion
  KVM: PPC: remove hugetlb.h inclusion

 arch/powerpc/kvm/book3s_hv.c |  1 -
 include/linux/hugetlb.h      | 14 --------------
 include/linux/mm.h           | 22 ++++++++++++++++++++++
 mm/hugetlb.c                 | 28 ----------------------------
 mm/vma.c                     | 21 +++++++++++++++++++++
 virt/kvm/kvm_main.c          |  1 -
 6 files changed, 43 insertions(+), 44 deletions(-)


base-commit: f75825cdfc4c5477cffcfd2cafa4e5ce5aa67f13
-- 
2.43.0