Signed-off-by: Adam Litke <redacted>
---

 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 2d2c08d..a2fa66d 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;
+	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);
+};