Commit 900fc5f1 authored by Naoya Horiguchi's avatar Naoya Horiguchi Committed by Linus Torvalds

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: default avatarNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: default avatarKirill 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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent fafaa426
...@@ -1201,6 +1201,7 @@ struct mm_walk { ...@@ -1201,6 +1201,7 @@ struct mm_walk {
int walk_page_range(unsigned long addr, unsigned long end, int walk_page_range(unsigned long addr, unsigned long end,
struct mm_walk *walk); 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, void free_pgd_range(struct mmu_gather *tlb, unsigned long addr,
unsigned long end, unsigned long floor, unsigned long ceiling); unsigned long end, unsigned long floor, unsigned long ceiling);
int copy_page_range(struct mm_struct *dst, struct mm_struct *src, int copy_page_range(struct mm_struct *dst, struct mm_struct *src,
......
...@@ -272,3 +272,21 @@ int walk_page_range(unsigned long start, unsigned long end, ...@@ -272,3 +272,21 @@ int walk_page_range(unsigned long start, unsigned long end,
} while (start = next, start < end); } while (start = next, start < end);
return err; 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);
}
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