@@ -2178,16 +2178,16 @@ static void nocb_gp_wait(struct rcu_data *my_rdp)
my_rdp->nocb_gp_gp = needwait_gp;
my_rdp->nocb_gp_seq = needwait_gp ? wait_gp_seq : 0;
if (bypass) {
- raw_spin_lock_irqsave(&my_rdp->nocb_gp_lock, flags);
- // Avoid race with first bypass CB.
- WRITE_ONCE(my_rdp->nocb_defer_wakeup, RCU_NOCB_WAKE_NOT);
- del_timer(&my_rdp->nocb_timer);
if (!rcu_nocb_poll) {
+ raw_spin_lock_irqsave(&my_rdp->nocb_gp_lock, flags);
+ // Avoid race with first bypass CB.
+ WRITE_ONCE(my_rdp->nocb_defer_wakeup, RCU_NOCB_WAKE_NOT);
+ del_timer(&my_rdp->nocb_timer);
// At least one child with non-empty ->nocb_bypass, so set
// timer in order to avoid stranding its callbacks.
mod_timer(&my_rdp->nocb_bypass_timer, j + 2);
+ raw_spin_unlock_irqrestore(&my_rdp->nocb_gp_lock, flags);
}
- raw_spin_unlock_irqrestore(&my_rdp->nocb_gp_lock, flags);
}
if (rcu_nocb_poll) {
/* Polling, so trace if first poll in the series. */
No need to disarm the nocb_timer if rcu_nocb is polling because it shouldn't be armed either. Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Lai Jiangshan <jiangshanlai@gmail.com> Cc: Joel Fernandes <joel@joelfernandes.org> Cc: Neeraj Upadhyay <neeraju@codeaurora.org> Cc: Boqun Feng <boqun.feng@gmail.com> --- kernel/rcu/tree_plugin.h | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)