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| author | Matt Mackall <mpm@selenic.com> | 2008-02-04 22:29:01 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-05 09:44:16 -0800 |
| commit | e6473092bd9116583ce9ab8cf1b6570e1aa6fc83 (patch) | |
| tree | e91a7ca6ce89f24a4a2d500d748dabf727c61887 /include/linux/mm.h | |
| parent | 698dd4ba6b12e34e1e432c944c01478c0b2cd773 (diff) | |
| download | lwn-e6473092bd9116583ce9ab8cf1b6570e1aa6fc83.tar.gz lwn-e6473092bd9116583ce9ab8cf1b6570e1aa6fc83.zip | |
maps4: introduce a generic page walker
Introduce a general page table walker
Signed-off-by: Matt Mackall <mpm@selenic.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/mm.h')
| -rw-r--r-- | include/linux/mm.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index bcbe6979ff65..89d7c691b93a 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, |