hugetlb.h

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#ifndef _ASM_SH_HUGETLB_H
#define _ASM_SH_HUGETLB_H

#include <asm/cacheflush.h>
#include <asm/page.h>


static inline int is_hugepage_only_range(struct mm_struct *mm,
                     unsigned long addr,
                     unsigned long len) {
    return 0;
}

/*
 * If the arch doesn't supply something else, assume that hugepage
 * size aligned regions are ok without further preparation.
 */
static inline int prepare_hugepage_range(struct file *file,
            unsigned long addr, unsigned long len)
{
    if (len & ~HPAGE_MASK)
        return -EINVAL;
    if (addr & ~HPAGE_MASK)
        return -EINVAL;
    return 0;
}

static inline void hugetlb_prefault_arch_hook(struct mm_struct *mm) {
}

static inline void hugetlb_free_pgd_range(struct mmu_gather *tlb,
                      unsigned long addr, unsigned long end,
                      unsigned long floor,
                      unsigned long ceiling)
{
    free_pgd_range(tlb, addr, end, floor, ceiling);
}

static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
                   pte_t *ptep, pte_t pte)
{
    set_pte_at(mm, addr, ptep, pte);
}

static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm,
                        unsigned long addr, pte_t *ptep)
{
    return ptep_get_and_clear(mm, addr, ptep);
}

static inline void huge_ptep_clear_flush(struct vm_area_struct *vma,
                     unsigned long addr, pte_t *ptep)
{
}

static inline int huge_pte_none(pte_t pte)
{
    return pte_none(pte);
}

static inline pte_t huge_pte_wrprotect(pte_t pte)
{
    return pte_wrprotect(pte);
}

static inline void huge_ptep_set_wrprotect(struct mm_struct *mm,
                       unsigned long addr, pte_t *ptep)
{
    ptep_set_wrprotect(mm, addr, ptep);
}

static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
                         unsigned long addr, pte_t *ptep,
                         pte_t pte, int dirty)
{
    return ptep_set_access_flags(vma, addr, ptep, pte, dirty);
}

static inline pte_t huge_ptep_get(pte_t *ptep)
{
    return *ptep;
}

static inline int arch_prepare_hugepage(struct page *page)
{
    return 0;
}

static inline void arch_release_hugepage(struct page *page)
{
}

static inline void arch_clear_hugepage_flags(struct page *page)
{
    clear_bit(PG_dcache_clean, &page->flags);
}

#endif /* _ASM_SH_HUGETLB_H */