summaryrefslogtreecommitdiff
path: root/drivers/char
diff options
context:
space:
mode:
authorJohn Hubbard <jhubbard@nvidia.com>2020-05-27 04:26:28 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2020-05-27 12:09:26 +0300
commit03358b0f7bc7b5868bbb30f47224a937e2e4d6d3 (patch)
treeee6a7882a08b15df51f0e736103b5dd754995e7f /drivers/char
parentd25594d764613ad58656bbe74a86706204813a9f (diff)
downloadlinux-03358b0f7bc7b5868bbb30f47224a937e2e4d6d3.tar.xz
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 'drivers/char')
0 files changed, 0 insertions, 0 deletions