[PATCH rcu 1/9] srcu: Release early_srcu resources when no longer in use

[Paul E. McKenney]

From: Zqiang <qiang1.zhang@xxxxxxxxx>

Kernels built with the CONFIG_TREE_SRCU Kconfig option set and then
booted with rcupdate.rcu_self_test=1 and srcutree.convert_to_big=1 will
test Tree SRCU during early boot.  The early_srcu structure's srcu_node
array will be allocated when init_srcu_struct_fields() is invoked,
but after the test completes this early_srcu structure will not be used.

This commit therefore invokes cleanup_srcu_struct() to free that srcu_node
structure.

Signed-off-by: Zqiang <qiang1.zhang@xxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx>
---
 kernel/rcu/update.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c
index f5e6a2f95a2a0..a5b4abbee6439 100644
--- a/kernel/rcu/update.c
+++ b/kernel/rcu/update.c
@@ -586,6 +586,7 @@ static int rcu_verify_early_boot_tests(void)
 		early_boot_test_counter++;
 		srcu_barrier(&early_srcu);
 		WARN_ON_ONCE(!poll_state_synchronize_srcu(&early_srcu, early_srcu_cookie));
+		cleanup_srcu_struct(&early_srcu);
 	}
 	if (rcu_self_test_counter != early_boot_test_counter) {
 		WARN_ON(1);
-- 
2.31.1.189.g2e36527f23