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| author | John Hubbard <jhubbard@nvidia.com> | 2020-05-27 03:26:28 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-27 11:09:26 +0200 |
| commit | 03358b0f7bc7b5868bbb30f47224a937e2e4d6d3 (patch) | |
| tree | ee6a7882a08b15df51f0e736103b5dd754995e7f /kernel/resource.c | |
| parent | misc: xilinx-sdfec: cleanup return value in xsdfec_table_write() (diff) | |
| download | linux-03358b0f7bc7b5868bbb30f47224a937e2e4d6d3.tar.xz linux-03358b0f7bc7b5868bbb30f47224a937e2e4d6d3.zip | |
misc: xilinx-sdfec: convert get_user_pages() --> pin_user_pages()
This code was using get_user_pages*(), in approximately a "Case 1"
scenario (Direct IO), using the categorization from [1]. That means
that it's time to convert the get_user_pages*() + put_page() calls to
pin_user_pages*() + 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: Derek Kiernan <derek.kiernan@xilinx.com>
Cc: Dragan Cvetic <dragan.cvetic@xilinx.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: John Hubbard <jhubbard@nvidia.com>
Link: https://lore.kernel.org/r/20200527012628.1100649-4-jhubbard@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/resource.c')
0 files changed, 0 insertions, 0 deletions