Messages in this thread Patch in this message | | | From | Naoya Horiguchi <> | Subject | [PATCH -mm v7 03/13] pagewalk: add walk_page_vma() | Date | Fri, 7 Nov 2014 07:01:56 +0000 |
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Introduces walk_page_vma(), which is useful for the callers which want to walk over a given vma. It's used by later patches.
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> --- ChangeLog v3: - check walk_page_test's return value instead of walk->skip --- include/linux/mm.h | 1 + mm/pagewalk.c | 18 ++++++++++++++++++ 2 files changed, 19 insertions(+)
diff --git mmotm-2014-11-05-16-01.orig/include/linux/mm.h mmotm-2014-11-05-16-01/include/linux/mm.h index 25a4cf75b575..1022cc27150e 100644 --- mmotm-2014-11-05-16-01.orig/include/linux/mm.h +++ mmotm-2014-11-05-16-01/include/linux/mm.h @@ -1157,6 +1157,7 @@ struct mm_walk { int walk_page_range(unsigned long addr, unsigned long end, struct mm_walk *walk); +int walk_page_vma(struct vm_area_struct *vma, struct mm_walk *walk); void free_pgd_range(struct mmu_gather *tlb, unsigned long addr, unsigned long end, unsigned long floor, unsigned long ceiling); int copy_page_range(struct mm_struct *dst, struct mm_struct *src, diff --git mmotm-2014-11-05-16-01.orig/mm/pagewalk.c mmotm-2014-11-05-16-01/mm/pagewalk.c index d9cc3caae802..4c9a653ba563 100644 --- mmotm-2014-11-05-16-01.orig/mm/pagewalk.c +++ mmotm-2014-11-05-16-01/mm/pagewalk.c @@ -272,3 +272,21 @@ int walk_page_range(unsigned long start, unsigned long end, } while (start = next, start < end); return err; } + +int walk_page_vma(struct vm_area_struct *vma, struct mm_walk *walk) +{ + int err; + + if (!walk->mm) + return -EINVAL; + + VM_BUG_ON(!rwsem_is_locked(&walk->mm->mmap_sem)); + VM_BUG_ON(!vma); + walk->vma = vma; + err = walk_page_test(vma->vm_start, vma->vm_end, walk); + if (err > 0) + return 0; + if (err < 0) + return err; + return __walk_page_range(vma->vm_start, vma->vm_end, walk); +} -- 2.2.0.rc0.2.gf745acb
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