Messages in this thread Patch in this message | | | From | Naoya Horiguchi <> | Subject | [PATCH v3 03/13] pagewalk: add walk_page_vma() | Date | Fri, 20 Jun 2014 16:11:29 -0400 |
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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.
ChangeLog: - check walk_page_test's return value instead of walk->skip
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> --- include/linux/mm.h | 1 + mm/pagewalk.c | 18 ++++++++++++++++++ 2 files changed, 19 insertions(+)
diff --git v3.16-rc1.orig/include/linux/mm.h v3.16-rc1/include/linux/mm.h index 489a63a06a4a..7e9287750866 100644 --- v3.16-rc1.orig/include/linux/mm.h +++ v3.16-rc1/include/linux/mm.h @@ -1137,6 +1137,7 @@ 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 v3.16-rc1.orig/mm/pagewalk.c v3.16-rc1/mm/pagewalk.c index 86d811202374..16865e5029f6 100644 --- v3.16-rc1.orig/mm/pagewalk.c +++ v3.16-rc1/mm/pagewalk.c @@ -271,3 +271,21 @@ 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); +} -- 1.9.3
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