if rcu_read_unlock_special() is deferred, we can invoke it earlier
in the schedule-tick.
Signed-off-by: Lai Jiangshan <la...@cn.fujitsu.com>
---
kernel/rcutree_plugin.h | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
index 997b424..c9ff9f1 100644
--- a/kernel/rcutree_plugin.h
+++ b/kernel/rcutree_plugin.h
@@ -684,8 +684,11 @@ static void rcu_preempt_check_callbacks(int cpu)
{
struct task_struct *t = current;
- if (t->rcu_read_lock_nesting == 0) {
+ if (t->rcu_read_lock_nesting == 0 ||
+ t->rcu_read_lock_nesting == INT_MIN) {
rcu_preempt_qs(cpu);
+ if (t->rcu_read_unlock_special)
+ rcu_read_unlock_special(t, false);
return;
}
if (t->rcu_read_lock_nesting > 0 &&
--
1.7.4.4
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