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author | Alex Richardson <arichardson@FreeBSD.org> | 2021-02-18 10:25:10 +0000 |
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committer | Alex Richardson <arichardson@FreeBSD.org> | 2021-02-18 14:02:48 +0000 |
commit | fa2528ac643519072c498b483d0dcc1fa5d99bc1 (patch) | |
tree | 255d2d54811e94f63b72fe40c4a88b4f11978e9f /cddl/lib/libzfs | |
parent | df093aa9463b2121d8307fb91c4ba7cf17f4ea64 (diff) | |
download | src-fa2528ac643519072c498b483d0dcc1fa5d99bc1.tar.gz src-fa2528ac643519072c498b483d0dcc1fa5d99bc1.zip |
Use atomic loads/stores when updating td->td_state
KCSAN complains about racy accesses in the locking code. Those races are
fine since they are inside a TD_SET_RUNNING() loop that expects the value
to be changed by another CPU.
Use relaxed atomic stores/loads to indicate that this variable can be
written/read by multiple CPUs at the same time. This will also prevent
the compiler from doing unexpected re-ordering.
Reported by: GENERIC-KCSAN
Test Plan: KCSAN no longer complains, kernel still runs fine.
Reviewed By: markj, mjg (earlier version)
Differential Revision: https://reviews.freebsd.org/D28569
Diffstat (limited to 'cddl/lib/libzfs')
0 files changed, 0 insertions, 0 deletions