diff options
| author | Andrea Arcangeli <[email protected]> | 2015-09-04 15:47:04 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2015-09-04 16:54:41 -0700 |
| commit | c1a4de99fada21e2e9251e52cbb51eff5aadc757 (patch) | |
| tree | 5cac492eb5484a89f141b85077fa0671e88dfe46 /include/linux | |
| parent | 1f1c6f075904c241f9e44eb37efa8777141fc938 (diff) | |
userfaultfd: mcopy_atomic|mfill_zeropage: UFFDIO_COPY|UFFDIO_ZEROPAGE preparation
This implements mcopy_atomic and mfill_zeropage that are the lowlevel
VM methods that are invoked respectively by the UFFDIO_COPY and
UFFDIO_ZEROPAGE userfaultfd commands.
Signed-off-by: Andrea Arcangeli <[email protected]>
Acked-by: Pavel Emelyanov <[email protected]>
Cc: Sanidhya Kashyap <[email protected]>
Cc: [email protected]
Cc: "Kirill A. Shutemov" <[email protected]>
Cc: Andres Lagar-Cavilla <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Peter Feiner <[email protected]>
Cc: "Dr. David Alan Gilbert" <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: "Huangpeng (Peter)" <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/userfaultfd_k.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/userfaultfd_k.h b/include/linux/userfaultfd_k.h index e1e43609a179..587480ad41b7 100644 --- a/include/linux/userfaultfd_k.h +++ b/include/linux/userfaultfd_k.h @@ -30,6 +30,12 @@ extern int handle_userfault(struct vm_area_struct *vma, unsigned long address, unsigned int flags, unsigned long reason); +extern ssize_t mcopy_atomic(struct mm_struct *dst_mm, unsigned long dst_start, + unsigned long src_start, unsigned long len); +extern ssize_t mfill_zeropage(struct mm_struct *dst_mm, + unsigned long dst_start, + unsigned long len); + /* mm helpers */ static inline bool is_mergeable_vm_userfaultfd_ctx(struct vm_area_struct *vma, struct vm_userfaultfd_ctx vm_ctx) |