[v3,0/9] Use vm_insert_range

Message

Souptick Joarder Dec. 6, 2018, 6:37 p.m. UTC

Previouly drivers have their own way of mapping range of
kernel pages/memory into user vma and this was done by
invoking vm_insert_page() within a loop.

As this pattern is common across different drivers, it can
be generalized by creating a new function and use it across
the drivers.

vm_insert_range is the new API which will be used to map a
range of kernel memory/pages to user vma.

All the applicable places are converted to use new vm_insert_range
in this patch series.

v1 -> v2:
        Address review comment on mm/memory.c. Add EXPORT_SYMBOL
        for vm_insert_range and corrected the documentation part
        for this API.

        In drivers/gpu/drm/xen/xen_drm_front_gem.c, replace err
        with ret as suggested.

        In drivers/iommu/dma-iommu.c, handle the scenario of partial
        mmap() of large buffer by passing *pages + vma->vm_pgoff* to
        vm_insert_range().

v2 -> v3:
	Declaration of vm_insert_range() moved to include/linux/mm.h

Souptick Joarder (9):
  mm: Introduce new vm_insert_range API
  arch/arm/mm/dma-mapping.c: Convert to use vm_insert_range
  drivers/firewire/core-iso.c: Convert to use vm_insert_range
  drm/rockchip/rockchip_drm_gem.c: Convert to use vm_insert_range
  drm/xen/xen_drm_front_gem.c: Convert to use vm_insert_range
  iommu/dma-iommu.c: Convert to use vm_insert_range
  videobuf2/videobuf2-dma-sg.c: Convert to use vm_insert_range
  xen/gntdev.c: Convert to use vm_insert_range
  xen/privcmd-buf.c: Convert to use vm_insert_range

 arch/arm/mm/dma-mapping.c                         | 21 +++++--------
 drivers/firewire/core-iso.c                       | 15 ++-------
 drivers/gpu/drm/rockchip/rockchip_drm_gem.c       | 20 ++----------
 drivers/gpu/drm/xen/xen_drm_front_gem.c           | 20 ++++--------
 drivers/iommu/dma-iommu.c                         | 13 ++------
 drivers/media/common/videobuf2/videobuf2-dma-sg.c | 23 +++++---------
 drivers/xen/gntdev.c                              | 11 +++----
 drivers/xen/privcmd-buf.c                         |  8 ++---
 include/linux/mm.h                                |  2 ++
 mm/memory.c                                       | 38 +++++++++++++++++++++++
 mm/nommu.c                                        |  7 +++++
 11 files changed, 80 insertions(+), 98 deletions(-)