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author | John Hubbard <jhubbard@nvidia.com> | 2020-01-30 22:12:47 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-01-31 10:30:37 -0800 |
commit | 4789fcdd14095281952b5dd19a928d5d8b279e90 (patch) | |
tree | 16cdd8cb3591f44e3ab447c55715bb9c27a652c3 /drivers/media | |
parent | mm/gup: allow FOLL_FORCE for get_user_pages_fast() (diff) | |
download | linux-dev-4789fcdd14095281952b5dd19a928d5d8b279e90.tar.xz linux-dev-4789fcdd14095281952b5dd19a928d5d8b279e90.zip |
IB/umem: use get_user_pages_fast() to pin DMA pages
And get rid of the mmap_sem calls, as part of that. Note that
get_user_pages_fast() will, if necessary, fall back to
__gup_longterm_unlocked(), which takes the mmap_sem as needed.
Link: http://lkml.kernel.org/r/20200107224558.2362728-10-jhubbard@nvidia.com
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Björn Töpel <bjorn.topel@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/media')
0 files changed, 0 insertions, 0 deletions