The patch titled
Subject: pagewalk: add walk_page_vma()
has been added to the -mm tree. Its filename is
pagewalk-add-walk_page_vma.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/pagewalk-add-walk_page_vma.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/pagewalk-add-walk_page_vma.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
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------------------------------------------------------
From: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Subject: 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@xxxxxxxxxxxxx>
Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Pavel Emelyanov <xemul@xxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mm.h | 1 +
mm/pagewalk.c | 18 ++++++++++++++++++
2 files changed, 19 insertions(+)
diff -puN include/linux/mm.h~pagewalk-add-walk_page_vma include/linux/mm.h
--- a/include/linux/mm.h~pagewalk-add-walk_page_vma
+++ a/include/linux/mm.h
@@ -1192,6 +1192,7 @@ 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 -puN mm/pagewalk.c~pagewalk-add-walk_page_vma mm/pagewalk.c
--- a/mm/pagewalk.c~pagewalk-add-walk_page_vma
+++ a/mm/pagewalk.c
@@ -272,3 +272,21 @@ int walk_page_range(unsigned long start,
} 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);
+}
_
Patches currently in -mm which might be from n-horiguchi@xxxxxxxxxxxxx are
mm-pagewalk-call-pte_hole-for-vm_pfnmap-during-walk_page_range.patch
mm-add-kpf_zero_page-flag-for-proc-kpageflags.patch
mm-hugetlb-reduce-arch-dependent-code-around-follow_huge_.patch
mm-hugetlb-pmd_huge-returns-true-for-non-present-hugepage.patch
mm-hugetlb-take-page-table-lock-in-follow_huge_pmd.patch
mm-hugetlb-fix-getting-refcount-0-page-in-hugetlb_fault.patch
mm-hugetlb-add-migration-hwpoisoned-entry-check-in-hugetlb_change_protection.patch
mm-hugetlb-add-migration-entry-check-in-__unmap_hugepage_range.patch
mm-hugetlb-fix-suboptimal-migration-hwpoisoned-entry-check.patch
mm-hugetlb-cleanup-and-rename-is_hugetlb_entry_migrationhwpoisoned.patch
mm-pagewalk-remove-pgd_entry-and-pud_entry.patch
revert-mm-pagewalk-call-pte_hole-for-vm_pfnmap-during-walk_page_range.patch
pagewalk-improve-vma-handling.patch
pagewalk-add-walk_page_vma.patch
smaps-remove-mem_size_stats-vma-and-use-walk_page_vma.patch
clear_refs-remove-clear_refs_private-vma-and-introduce-clear_refs_test_walk.patch
pagemap-use-walk-vma-instead-of-calling-find_vma.patch
numa_maps-fix-typo-in-gather_hugetbl_stats.patch
numa_maps-remove-numa_maps-vma.patch
memcg-cleanup-preparation-for-page-table-walk.patch
arch-powerpc-mm-subpage-protc-use-walk-vma-and-walk_page_vma.patch
mempolicy-apply-page-table-walker-on-queue_pages_range.patch
mm-proc-pid-clear_refs-avoid-split_huge_page.patch
mincore-apply-page-table-walker-on-do_mincore.patch
do_shared_fault-check-that-mmap_sem-is-held.patch
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