diff options
| author | John Hubbard <[email protected]> | 2020-05-25 22:17:54 +0000 |
|---|---|---|
| committer | Moritz Fischer <[email protected]> | 2020-06-19 01:12:06 +0000 |
| commit | 55dc9b87e4a8e4d0fb1b7169bab7e23d27ba4209 (patch) | |
| tree | 3f2f0e9061417f741522c5bbef8ff5a10cb4a46e /drivers/fpga/fpga-mgr.c | |
| parent | Linux 5.8-rc1 (diff) | |
| download | kernel-55dc9b87e4a8e4d0fb1b7169bab7e23d27ba4209.tar.gz kernel-55dc9b87e4a8e4d0fb1b7169bab7e23d27ba4209.zip | |
fpga: dfl: afu: convert get_user_pages() --> pin_user_pages()
This code was using get_user_pages_fast(), in a "Case 2" scenario
(DMA/RDMA), using the categorization from [1]. That means that it's
time to convert the get_user_pages_fast() + put_page() calls to
pin_user_pages_fast() + unpin_user_pages() calls.
There is some helpful background in [2]: basically, this is a small
part of fixing a long-standing disconnect between pinning pages, and
file systems' use of those pages.
[1] Documentation/core-api/pin_user_pages.rst
[2] "Explicit pinning of user-space pages":
https://lwn.net/Articles/807108/
Cc: Xu Yilun <[email protected]>
Cc: Wu Hao <[email protected]>
Cc: Moritz Fischer <[email protected]>
Cc: [email protected]
Signed-off-by: John Hubbard <[email protected]>
Acked-by: Wu Hao <[email protected]>
Signed-off-by: Moritz Fischer <[email protected]>
Diffstat (limited to 'drivers/fpga/fpga-mgr.c')
0 files changed, 0 insertions, 0 deletions