On Fri, Mar 06, 2026 at 11:15:56AM +0100, David Hildenbrand (Arm) wrote: > 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 <[email protected]> > Cc: Madhavan Srinivasan <[email protected]> > Cc: Nicholas Piggin <[email protected]> > Cc: Michael Ellerman <[email protected]> > Cc: "Christophe Leroy (CS GROUP)" <[email protected]> > Cc: Muchun Song <[email protected]> > Cc: Oscar Salvador <[email protected]> > Cc: Lorenzo Stoakes <[email protected]> > Cc: "Liam R. Howlett" <[email protected]> > Cc: Vlastimil Babka <[email protected]> > Cc: Mike Rapoport <[email protected]> > Cc: Suren Baghdasaryan <[email protected]> > Cc: Michal Hocko <[email protected]> > Cc: Jann Horn <[email protected]> > Cc: Pedro Falcato <[email protected]> > Cc: Paolo Bonzini <[email protected]> > Cc: Dan Williams <[email protected]> > > 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(-)
For the series: Acked-by: Mike Rapoport (Microsoft) <[email protected]> > base-commit: f75825cdfc4c5477cffcfd2cafa4e5ce5aa67f13 > -- > 2.43.0 > -- Sincerely yours, Mike.
