diff options
| author | Neeraj Upadhyay <quic_neeraju@quicinc.com> | 2021-12-13 11:40:24 +0530 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2022-02-01 17:05:10 -0800 |
| commit | 4d266c247d56751c2c97e0c411212b59e90922fc (patch) | |
| tree | 6d345b2308f4f1bd41f53849c999373a0f551c29 /kernel | |
| parent | da123016ca8cb5697366c0b2dd55059b976e67e4 (diff) | |
rcu/exp: Fix check for idle context in rcu_exp_handler
For PREEMPT_RCU, the rcu_exp_handler() function checks
whether the current CPU is in idle, by calling
rcu_dynticks_curr_cpu_in_eqs(). However, rcu_exp_handler()
is called in IPI handler context. So, it should be checking
the idle context using rcu_is_cpu_rrupt_from_idle(). Fix this
by using rcu_is_cpu_rrupt_from_idle() instead of
rcu_dynticks_curr_cpu_in_eqs(). Non-preempt configuration
already uses the correct check.
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/rcu/tree_exp.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/rcu/tree_exp.h b/kernel/rcu/tree_exp.h index 237a79989aba..1568c8ef185b 100644 --- a/kernel/rcu/tree_exp.h +++ b/kernel/rcu/tree_exp.h @@ -656,7 +656,7 @@ static void rcu_exp_handler(void *unused) */ if (!depth) { if (!(preempt_count() & (PREEMPT_MASK | SOFTIRQ_MASK)) || - rcu_dynticks_curr_cpu_in_eqs()) { + rcu_is_cpu_rrupt_from_idle()) { rcu_report_exp_rdp(rdp); } else { WRITE_ONCE(rdp->cpu_no_qs.b.exp, true); |