diff options
| author | Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> | 2015-02-12 00:27:40 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-12 02:06:05 +0100 |
| commit | 900fc5f197b05253ae9433fb9a066c3f37d08f69 (patch) | |
| tree | b4a880a4329b4a5c5aaa96a95dc8486a05756e2c /mm | |
| parent | pagewalk: improve vma handling (diff) | |
| download | linux-900fc5f197b05253ae9433fb9a066c3f37d08f69.tar.xz linux-900fc5f197b05253ae9433fb9a066c3f37d08f69.zip | |
pagewalk: add walk_page_vma()
Introduce 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>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/pagewalk.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/mm/pagewalk.c b/mm/pagewalk.c index d9cc3caae802..4c9a653ba563 100644 --- a/mm/pagewalk.c +++ b/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); +} |