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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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