diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2024-03-26 20:28:22 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-04-25 20:56:18 -0700 |
| commit | 5beaee54a324ba1fe307e341ec825d5d099f4091 (patch) | |
| tree | ec2b731c12b16589ccad98101de58594805006f2 /mm/userfaultfd.c | |
| parent | 4d30eac3744d195ac43fbc36117d1e5de447b1ca (diff) | |
mm: add is_huge_zero_folio()
This is the folio equivalent of is_huge_zero_page(). It doesn't add any
efficiency, but it does prevent the caller from passing a tail page and
getting confused when the predicate returns false.
Link: https://lkml.kernel.org/r/20240326202833.523759-3-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/userfaultfd.c')
| -rw-r--r-- | mm/userfaultfd.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/userfaultfd.c b/mm/userfaultfd.c index 3c3539c573e7..a0ec14553fbe 100644 --- a/mm/userfaultfd.c +++ b/mm/userfaultfd.c @@ -1664,7 +1664,7 @@ ssize_t move_pages(struct userfaultfd_ctx *ctx, unsigned long dst_start, !pmd_none(dst_pmdval)) { struct folio *folio = pfn_folio(pmd_pfn(*src_pmd)); - if (!folio || (!is_huge_zero_page(&folio->page) && + if (!folio || (!is_huge_zero_folio(folio) && !PageAnonExclusive(&folio->page))) { spin_unlock(ptl); err = -EBUSY; |