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| author | Paul E. McKenney <paulmck@kernel.org> | 2021-08-06 08:57:26 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2021-09-13 16:36:16 -0700 |
| commit | fd13fe16db0d82612b260640f4e26f6d9d1e11fd (patch) | |
| tree | ca0266ea052c516cc2634505d08aae99cffa3c91 | |
| parent | eb77abfdeed29dd032c923e16fe8d91fa95cd316 (diff) | |
| download | linux-fd13fe16db0d82612b260640f4e26f6d9d1e11fd.tar.bz2 | |
rcutorture: Don't cpuhp_remove_state() if cpuhp_setup_state() failed
Currently, in CONFIG_RCU_BOOST kernels, if the rcu_torture_init()
function's call to cpuhp_setup_state() fails, rcu_torture_cleanup()
gamely passes nonsense to cpuhp_remove_state(). This results in
strange and misleading splats. This commit therefore ensures that if
the rcu_torture_init() function's call to cpuhp_setup_state() fails,
rcu_torture_cleanup() avoids invoking cpuhp_remove_state().
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
| -rw-r--r-- | kernel/rcu/rcutorture.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index b90cd4d98a20..424184764ef0 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -2819,7 +2819,7 @@ rcu_torture_cleanup(void) rcutorture_seq_diff(gp_seq, start_gp_seq)); torture_stop_kthread(rcu_torture_stats, stats_task); torture_stop_kthread(rcu_torture_fqs, fqs_task); - if (rcu_torture_can_boost()) + if (rcu_torture_can_boost() && rcutor_hp >= 0) cpuhp_remove_state(rcutor_hp); /* @@ -3132,9 +3132,9 @@ rcu_torture_init(void) firsterr = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "RCU_TORTURE", rcutorture_booster_init, rcutorture_booster_cleanup); + rcutor_hp = firsterr; if (torture_init_error(firsterr)) goto unwind; - rcutor_hp = firsterr; // Testing RCU priority boosting requires rcutorture do // some serious abuse. Counter this by running ksoftirqd |