From efa3c40cfac0777071e30383d209534e09ee454b Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Fri, 25 Nov 2022 08:42:02 -0800 Subject: rcu: Add test code for semaphore-like SRCU readers This commit adds trivial test code for srcu_down_read() and srcu_up_read(). Signed-off-by: Paul E. McKenney --- kernel/rcu/update.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'kernel/rcu') diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c index a5b4abbee643..a72f98c120f0 100644 --- a/kernel/rcu/update.c +++ b/kernel/rcu/update.c @@ -555,9 +555,12 @@ struct early_boot_kfree_rcu { static void early_boot_test_call_rcu(void) { static struct rcu_head head; + int idx; static struct rcu_head shead; struct early_boot_kfree_rcu *rhp; + idx = srcu_down_read(&early_srcu); + srcu_up_read(&early_srcu, idx); call_rcu(&head, test_callback); early_srcu_cookie = start_poll_synchronize_srcu(&early_srcu); call_srcu(&early_srcu, &shead, test_callback); -- cgit v1.2.3-73-gaa49b