Andreas Gruenbacher 6e213bc614 gup: Introduce FOLL_NOFAULT flag to disable page faults ...

commit 55b8fe703bc51200d4698596c90813453b35ae63 upstream

Introduce a new FOLL_NOFAULT flag that causes get_user_pages to return
-EFAULT when it would otherwise trigger a page fault.  This is roughly
similar to FOLL_FAST_ONLY but available on all architectures, and less
fragile.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2022-05-01 17:22:32 +02:00

103 KiB

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