[v2,0/2] mm: support NOSIGBUS on fault of mmap

Message

Ming Lin June 4, 2021, 7:43 a.m. UTC

These 2 patches are based on the discussion of "Sealed memfd & no-fault mmap"
at https://bit.ly/3pdwOGR

v2:
- make MAP_NOSIGBUS generic instead of being restricted to shmem
- use do_anonymous_page() to insert zero page
- fix build warnings/errors reported by LKP test robot

v1:
https://lkml.org/lkml/2021/6/1/1076

Ming Lin (2):
  mm: make "vm_flags" be an u64
  mm: adds NOSIGBUS extension to mmap()

 arch/arm64/Kconfig                           |   1 -
 arch/parisc/include/uapi/asm/mman.h          |   1 +
 arch/powerpc/Kconfig                         |   1 -
 arch/x86/Kconfig                             |   1 -
 drivers/android/binder.c                     |   6 +-
 drivers/gpu/drm/amd/amdkfd/kfd_chardev.c     |   2 +-
 drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c    |   2 +-
 drivers/gpu/drm/amd/amdkfd/kfd_events.c      |   2 +-
 drivers/infiniband/hw/hfi1/file_ops.c        |   2 +-
 drivers/infiniband/hw/qib/qib_file_ops.c     |   4 +-
 fs/exec.c                                    |   2 +-
 fs/userfaultfd.c                             |   6 +-
 include/linux/huge_mm.h                      |   4 +-
 include/linux/ksm.h                          |   4 +-
 include/linux/mm.h                           | 108 +++++++++++++--------------
 include/linux/mm_types.h                     |   6 +-
 include/linux/mman.h                         |   5 +-
 include/uapi/asm-generic/mman-common.h       |   1 +
 mm/Kconfig                                   |   2 -
 mm/debug.c                                   |   4 +-
 mm/khugepaged.c                              |   2 +-
 mm/ksm.c                                     |   2 +-
 mm/madvise.c                                 |   2 +-
 mm/memory.c                                  |  15 +++-
 mm/mmap.c                                    |  14 ++--
 mm/mprotect.c                                |   4 +-
 mm/mremap.c                                  |   2 +-
 tools/include/uapi/asm-generic/mman-common.h |   1 +
 28 files changed, 108 insertions(+), 98 deletions(-)