linux-kernel - [PATCH v2 rcu 13/13] srcu: Improve srcu_read_lock

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Message-Id: <20241011173931.2050422-13-paulmck@kernel.org>
Date: Fri, 11 Oct 2024 10:39:31 -0700
From: "Paul E. McKenney" <paulmck@...nel.org>
To: frederic@...nel.org,
	rcu@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	kernel-team@...a.com,
	rostedt@...dmis.org,
	"Paul E. McKenney" <paulmck@...nel.org>,
	Andrii Nakryiko <andrii@...nel.org>
Subject: [PATCH v2 rcu 13/13] srcu: Improve srcu_read_lock_lite() kernel-doc comment

Where RCU is watching is where it is OK to invoke rcu_read_lock().

Reported-by: Andrii Nakryiko <andrii@...nel.org>
Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
 include/linux/srcu.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/srcu.h b/include/linux/srcu.h
index 4ba96e2cfa405..bab1dae3f69e6 100644
--- a/include/linux/srcu.h
+++ b/include/linux/srcu.h
@@ -270,7 +270,8 @@ static inline int srcu_read_lock(struct srcu_struct *ssp) __acquires(ssp)
  * synchronize_rcu_expedited(), IPIs and all.
  *
  * Note that srcu_read_lock_lite() can be invoked only from those contexts
- * where RCU is watching.  Otherwise, lockdep will complain.
+ * where RCU is watching, that is, from contexts where it would be legal
+ * to invoke rcu_read_lock().  Otherwise, lockdep will complain.
  */
 static inline int srcu_read_lock_lite(struct srcu_struct *ssp) __acquires(ssp)
 {
-- 
2.40.1