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(parent: 55b8fe7) | patch
iov_iter: Introduce nofault flag to disable page faults
authorAndreas Gruenbacher <agruenba@redhat.com>
Mon, 12 Jul 2021 10:06:14 +0000 (12:06 +0200)
committerAndreas Gruenbacher <agruenba@redhat.com>
Sun, 24 Oct 2021 13:26:06 +0000 (15:26 +0200)
commit3337ab08d08b1a375f88471d9c8b1cac968cb054
treed59b8bcd05c76e7f7924a4d9eb587e3e2791b268tree | snapshot
parent55b8fe703bc51200d4698596c90813453b35ae63commit | diff
iov_iter: Introduce nofault flag to disable page faults

Introduce a new nofault flag to indicate to iov_iter_get_pages not to
fault in user pages.

This is implemented by passing the FOLL_NOFAULT flag to get_user_pages,
which causes get_user_pages to fail when it would otherwise fault in a
page. We'll use the ->nofault flag to prevent iomap_dio_rw from faulting
in pages when page faults are not allowed.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
include/linux/uio.h diff | blob | blame | history
lib/iov_iter.c diff | blob | blame | history
Linux 6.x block layer and io_uring tree(s)