diff options
| author | Mike Rapoport <[email protected]> | 2017-09-06 16:23:09 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2017-09-06 17:27:28 -0700 |
| commit | 8fb44e5403ca86e33411dfa12dd298ed5ab1c3f7 (patch) | |
| tree | c7fb42bdc95f97eaf230619cf9773ed808dadd26 | |
| parent | 3217d3c79b5d7aabf62daa4db8cf757abedc9f28 (diff) | |
userfaultfd: shmem: wire up shmem_mfill_zeropage_pte
For shmem VMAs we can use shmem_mfill_zeropage_pte for UFFDIO_ZEROPAGE
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Mike Rapoport <[email protected]>
Cc: "Kirill A. Shutemov" <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Cc: Hillf Danton <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Pavel Emelyanov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | mm/userfaultfd.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/mm/userfaultfd.c b/mm/userfaultfd.c index 48c015c80120..81192701964d 100644 --- a/mm/userfaultfd.c +++ b/mm/userfaultfd.c @@ -389,11 +389,13 @@ static __always_inline ssize_t mfill_atomic_pte(struct mm_struct *dst_mm, err = mfill_zeropage_pte(dst_mm, dst_pmd, dst_vma, dst_addr); } else { - err = -EINVAL; /* if zeropage is true return -EINVAL */ - if (likely(!zeropage)) + if (!zeropage) err = shmem_mcopy_atomic_pte(dst_mm, dst_pmd, dst_vma, dst_addr, src_addr, page); + else + err = shmem_mfill_zeropage_pte(dst_mm, dst_pmd, + dst_vma, dst_addr); } return err; |