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 v4: - rename skip_check to skip_lower_level_walking Signed-off-by: Naoya Horiguchi <n-horigu...@ah.jp.nec.com> --- include/linux/mm.h | 1 + mm/pagewalk.c | 18 ++++++++++++++++++ 2 files changed, 19 insertions(+) diff --git v3.14-rc2.orig/include/linux/mm.h v3.14-rc2/include/linux/mm.h index 4d0bc01de43c..144b08617957 100644 --- v3.14-rc2.orig/include/linux/mm.h +++ v3.14-rc2/include/linux/mm.h @@ -1104,6 +1104,7 @@ 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 v3.14-rc2.orig/mm/pagewalk.c v3.14-rc2/mm/pagewalk.c index 4770558feea8..2a88dfa58af6 100644 --- v3.14-rc2.orig/mm/pagewalk.c +++ v3.14-rc2/mm/pagewalk.c @@ -334,3 +334,21 @@ 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 (skip_lower_level_walking(walk)) + return 0; + if (err) + return err; + return __walk_page_range(vma->vm_start, vma->vm_end, walk); +} -- 1.8.5.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/