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| author |   Christophe Leroy <christophe.leroy@csgroup.eu> | 2022-01-14 14:05:13 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2022-01-15 16:30:26 +0200 |
| commit | 677b2a8c1f25db5b09c1ef5bf72faa39ea81d9cf (patch) | |
| tree | 663d5a0a7a5fade5b9edaeb0c7ef16fd320b0d23 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | mm/truncate.c: remove unneeded variable (diff) | |
| download | wireguard-linux-677b2a8c1f25db5b09c1ef5bf72faa39ea81d9cf.tar.xz wireguard-linux-677b2a8c1f25db5b09c1ef5bf72faa39ea81d9cf.zip | |
gup: avoid multiple user access locking/unlocking in fault_in_{read/write}able
fault_in_readable() and fault_in_writeable() perform __get_user() and
__put_user() in a loop, implying multiple user access locking/unlocking.
To avoid that, use user access blocks.
Link: https://lkml.kernel.org/r/720dcf79314acca1a78fae56d478cc851952149d.1637084492.git.christophe.leroy@csgroup.eu
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions