vma_mmu_pagesize
psize = vma_mmu_pagesize(vma);
SEQ_PUT_DEC(" kB\nMMUPageSize: ", vma_mmu_pagesize(vma));
unsigned long vma_mmu_pagesize(struct vm_area_struct *vma);
vma_mmu_pagesize(svma));
ptep = hugetlb_walk(vma, vmf->address, vma_mmu_pagesize(vma));