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-rw-r--r--include/linux/mm.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index bcbe6979ff6..89d7c691b93 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -718,6 +718,28 @@ unsigned long unmap_vmas(struct mmu_gather **tlb,
struct vm_area_struct *start_vma, unsigned long start_addr,
unsigned long end_addr, unsigned long *nr_accounted,
struct zap_details *);
+
+/**
+ * mm_walk - callbacks for walk_page_range
+ * @pgd_entry: if set, called for each non-empty PGD (top-level) entry
+ * @pud_entry: if set, called for each non-empty PUD (2nd-level) entry
+ * @pmd_entry: if set, called for each non-empty PMD (3rd-level) entry
+ * @pte_entry: if set, called for each non-empty PTE (4th-level) entry
+ * @pte_hole: if set, called for each hole at all levels
+ *
+ * (see walk_page_range for more details)
+ */
+struct mm_walk {
+ int (*pgd_entry)(pgd_t *, unsigned long, unsigned long, void *);
+ int (*pud_entry)(pud_t *, unsigned long, unsigned long, void *);
+ int (*pmd_entry)(pmd_t *, unsigned long, unsigned long, void *);
+ int (*pte_entry)(pte_t *, unsigned long, unsigned long, void *);
+ int (*pte_hole)(unsigned long, unsigned long, void *);
+};
+
+int walk_page_range(const struct mm_struct *, unsigned long addr,
+ unsigned long end, const struct mm_walk *walk,
+ void *private);
void free_pgd_range(struct mmu_gather **tlb, unsigned long addr,
unsigned long end, unsigned long floor, unsigned long ceiling);
void free_pgtables(struct mmu_gather **tlb, struct vm_area_struct *start_vma,