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    Subject[PATCH 1/7] Introduce the pagetable_operations and associated helper macros.
    Date

    Signed-off-by: Adam Litke <agl@us.ibm.com>
    ---

    include/linux/mm.h | 25 +++++++++++++++++++++++++
    1 files changed, 25 insertions(+), 0 deletions(-)

    diff --git a/include/linux/mm.h b/include/linux/mm.h
    index 60e0e4a..7089323 100644
    --- a/include/linux/mm.h
    +++ b/include/linux/mm.h
    @@ -98,6 +98,7 @@ struct vm_area_struct {

    /* Function pointers to deal with this struct. */
    struct vm_operations_struct * vm_ops;
    + const struct pagetable_operations_struct * pagetable_ops;

    /* Information about our backing store: */
    unsigned long vm_pgoff; /* Offset (within vm_file) in PAGE_SIZE
    @@ -218,6 +219,30 @@ struct vm_operations_struct {
    };

    struct mmu_gather;
    +
    +struct pagetable_operations_struct {
    + int (*fault)(struct mm_struct *mm,
    + struct vm_area_struct *vma,
    + unsigned long address, int write_access);
    + int (*copy_vma)(struct mm_struct *dst, struct mm_struct *src,
    + struct vm_area_struct *vma);
    + int (*pin_pages)(struct mm_struct *mm, struct vm_area_struct *vma,
    + struct page **pages, struct vm_area_struct **vmas,
    + unsigned long *position, int *length, int i);
    + void (*change_protection)(struct vm_area_struct *vma,
    + unsigned long address, unsigned long end, pgprot_t newprot);
    + unsigned long (*unmap_page_range)(struct vm_area_struct *vma,
    + unsigned long address, unsigned long end, long *zap_work);
    + void (*free_pgtable_range)(struct mmu_gather **tlb,
    + unsigned long addr, unsigned long end,
    + unsigned long floor, unsigned long ceiling);
    +};
    +
    +#define has_pt_op(vma, op) \
    + ((vma)->pagetable_ops && (vma)->pagetable_ops->op)
    +#define pt_op(vma, call) \
    + ((vma)->pagetable_ops->call)
    +
    struct inode;

    #define page_private(page) ((page)->private)
    -
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