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| author | Zilin Guan <zilinguan811@gmail.com> | 2024-11-10 17:47:47 +0300 |
|---|---|---|
| committer | Boqun Feng <boqun.feng@gmail.com> | 2025-02-05 08:52:38 +0300 |
| commit | 764f6a81103e83dc552237f77cc769dd550d8e01 (patch) | |
| tree | 322f12267de4392f4496d86f50807cf7b1000343 /tools/testing/selftests/bpf/prog_tests/autoload.c | |
| parent | a3e8162105e8266b94bb25d3d7e48645da4b0c26 (diff) | |
| download | linux-764f6a81103e83dc552237f77cc769dd550d8e01.tar.xz | |
rcu: Remove READ_ONCE() for rdp->gpwrap access in __note_gp_changes()
There is one access to the per-CPU rdp->gpwrap field in the
__note_gp_changes() function that does not use READ_ONCE(), but all other
accesses do use READ_ONCE(). When using the 8*TREE03 and CONFIG_NR_CPUS=8
configuration, KCSAN found no data races at that point. This is because
all calls to __note_gp_changes() hold rnp->lock, which excludes writes
to the rdp->gpwrap fields for all CPUs associated with that same leaf
rcu_node structure.
This commit therefore removes READ_ONCE() from rdp->gpwrap accesses
within the __note_gp_changes() function.
Signed-off-by: Zilin Guan <zilinguan811@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/autoload.c')
0 files changed, 0 insertions, 0 deletions