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List: linux-fsdevel
Subject: [PATCH 0/2] vhost, docs: convert to pin_user_pages(), new "case 5"
From: John Hubbard <jhubbard () nvidia ! com>
Date: 2020-05-29 23:43:07
Message-ID: 20200529234309.484480-1-jhubbard () nvidia ! com
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Hi,
It recently became clear to me that there are some get_user_pages*()
callers that don't fit neatly into any of the four cases that are so
far listed in pin_user_pages.rst. vhost.c is one of those.
Add a Case 5 to the documentation, and refer to that when converting
vhost.c.
Thanks to Jan Kara for helping me (again) in understanding the
interaction between get_user_pages() and page writeback [1].
This is based on today's mmotm, which has a nearby patch to
pin_user_pages.rst that rewords cases 3 and 4.
Note that I have only compile-tested the vhost.c patch, although that
does also include cross-compiling for a few other arches. Any run-time
testing would be greatly appreciated.
[1] https://lore.kernel.org/r/20200529070343.GL14550@quack2.suse.cz
John Hubbard (2):
docs: mm/gup: pin_user_pages.rst: add a "case 5"
vhost: convert get_user_pages() --> pin_user_pages()
Documentation/core-api/pin_user_pages.rst | 20 ++++++++++++++++++++
drivers/vhost/vhost.c | 5 ++---
2 files changed, 22 insertions(+), 3 deletions(-)
--=20
2.26.2
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