diff options
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tasks.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h index a0eaed522277..e583a2d47374 100644 --- a/kernel/rcu/tasks.h +++ b/kernel/rcu/tasks.h @@ -830,6 +830,12 @@ static void trc_read_check_handler(void *t_in) WRITE_ONCE(t->trc_reader_checked, true); goto reset_ipi; } + // If we are racing with an rcu_read_unlock_trace(), try again later. + if (unlikely(t->trc_reader_nesting < 0)) { + if (WARN_ON_ONCE(atomic_dec_and_test(&trc_n_readers_need_end))) + wake_up(&trc_wait); + goto reset_ipi; + } WRITE_ONCE(t->trc_reader_checked, true); // Get here if the task is in a read-side critical section. Set |