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| author | Peter Xu <peterx@redhat.com> | 2022-05-13 05:22:52 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2022-05-13 16:20:10 +0200 |
| commit | 8ee79edff6d3b43b2d0c1e41f92b32e128988b22 (patch) | |
| tree | 53a3c3b0b6b14f12852bcfe47885ea4fba9b2171 /drivers/atm/uPD98402.c | |
| parent | mm/uffd: PTE_MARKER_UFFD_WP (diff) | |
| download | linux-8ee79edff6d3b43b2d0c1e41f92b32e128988b22.tar.xz linux-8ee79edff6d3b43b2d0c1e41f92b32e128988b22.zip | |
mm/shmem: take care of UFFDIO_COPY_MODE_WP
Pass wp_copy into shmem_mfill_atomic_pte() through the stack, then apply
the UFFD_WP bit properly when the UFFDIO_COPY on shmem is with
UFFDIO_COPY_MODE_WP. wp_copy lands mfill_atomic_install_pte() finally.
Note: we must do pte_wrprotect() if !writable in
mfill_atomic_install_pte(), as mk_pte() could return a writable pte (e.g.,
when VM_SHARED on a shmem file).
Link: https://lkml.kernel.org/r/20220405014841.14185-1-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: "Kirill A . Shutemov" <kirill@shutemov.name>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Nadav Amit <nadav.amit@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'drivers/atm/uPD98402.c')
0 files changed, 0 insertions, 0 deletions