From: "Paul E. McKenney" <paulmck@kernel.org>
To: rcu@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, kernel-team@meta.com,
rostedt@goodmis.org, "Paul E. McKenney" <paulmck@kernel.org>
Subject: [PATCH rcu 6/9] rcu: Add test code for semaphore-like SRCU readers
Date: Wed, 4 Jan 2023 16:28:50 -0800 [thread overview]
Message-ID: <20230105002853.1769401-6-paulmck@kernel.org> (raw)
In-Reply-To: <20230105002845.GA1769240@paulmck-ThinkPad-P17-Gen-1>
This commit adds trivial test code for srcu_down_read() and
srcu_up_read().
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
kernel/rcu/update.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c
index a5b4abbee6439..a72f98c120f09 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);
--
2.31.1.189.g2e36527f23
next prev parent reply other threads:[~2023-01-05 0:37 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-05 0:28 [PATCH rcu 0/9] SRCU updates for v6.3 Paul E. McKenney
2023-01-05 0:28 ` [PATCH rcu 1/9] srcu: Release early_srcu resources when no longer in use Paul E. McKenney
2023-01-05 0:28 ` [PATCH rcu 2/9] srcu: Delegate work to the boot cpu if using SRCU_SIZE_SMALL Paul E. McKenney
2023-01-05 0:28 ` [PATCH rcu 3/9] srcu: Fix a misspelling in comment Paul E. McKenney
2023-01-05 0:28 ` [PATCH rcu 4/9] srcu: Fix the comparision in srcu_invl_snp_seq() Paul E. McKenney
2023-01-05 0:28 ` [PATCH rcu 5/9] rcu: Add srcu_down_read() and srcu_up_read() Paul E. McKenney
2023-01-05 0:28 ` Paul E. McKenney [this message]
2023-01-05 0:28 ` [PATCH rcu 7/9] srcu: Remove needless rcu_seq_done() check while holding read lock Paul E. McKenney
2023-01-05 0:28 ` [PATCH rcu 8/9] srcu: Yet more detail for srcu_readers_active_idx_check() comments Paul E. McKenney
2023-01-05 0:28 ` [PATCH rcu 9/9] srcu: Update comment after the index flip Paul E. McKenney
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