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| author |  Paul E. McKenney <paulmck@kernel.org>
| 2024-03-06 17:00:39 -0800 |
|---|---|---|
| committer |  Uladzislau Rezki (Sony) <urezki@gmail.com>
| 2024-04-09 15:10:13 +0200 |
| commit | c507e195016ccca18e375d14cfeb1186dac60b2c (patch) | |
| tree | 4aeb24bab9f5e29d5b6b9bd3bb773cad26310297 /kernel/rcu | |
| parent | rcutorture: Dump GP kthread state on insufficient cb-flood laundering (diff) | |
| download | linux-c507e195016ccca18e375d14cfeb1186dac60b2c.tar.gz linux-c507e195016ccca18e375d14cfeb1186dac60b2c.tar.bz2 linux-c507e195016ccca18e375d14cfeb1186dac60b2c.zip | |
rcutorture: ASSERT_EXCLUSIVE_WRITER() for ->rtort_pipe_count updates
It turns out that only one CPU at a time will ever invoke
rcu_torture_pipe_update_one() on a given rcu_torture structure.
This commit therefore adds three ASSERT_EXCLUSIVE_WRITER() calls
to enlist KCSAN's aid in checking this.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/rcutorture.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index eff51a26216f..d8c12eba35b7 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -466,6 +466,7 @@ rcu_torture_pipe_update_one(struct rcu_torture *rp) i = RCU_TORTURE_PIPE_LEN; atomic_inc(&rcu_torture_wcount[i]); WRITE_ONCE(rp->rtort_pipe_count, i + 1); + ASSERT_EXCLUSIVE_WRITER(rp->rtort_pipe_count); if (rp->rtort_pipe_count >= RCU_TORTURE_PIPE_LEN) { rp->rtort_mbtest = 0; return true; @@ -1399,6 +1400,7 @@ rcu_torture_writer(void *arg) if (rp == NULL) continue; rp->rtort_pipe_count = 0; + ASSERT_EXCLUSIVE_WRITER(rp->rtort_pipe_count); rcu_torture_writer_state = RTWS_DELAY; udelay(torture_random(&rand) & 0x3ff); rcu_torture_writer_state = RTWS_REPLACE; @@ -1414,6 +1416,7 @@ rcu_torture_writer(void *arg) atomic_inc(&rcu_torture_wcount[i]); WRITE_ONCE(old_rp->rtort_pipe_count, old_rp->rtort_pipe_count + 1); + ASSERT_EXCLUSIVE_WRITER(old_rp->rtort_pipe_count); // Make sure readers block polled grace periods. if (cur_ops->get_gp_state && cur_ops->poll_gp_state) { |