From: Zhu Yanjun <yanjun.zhu@xxxxxxxxx>
No functional change. The function get_next_path_rr needs to hold
rcu_read_lock. As such, if no rcu read lock, warnings will pop out.
Acked-by: Jack Wang <jinpu.wang@xxxxxxxxx>
Signed-off-by: Zhu Yanjun <yanjun.zhu@xxxxxxxxx>
---
V1->V2: Replace WARN_ON_ONCE with RCU_LOCKDEP_WARN
---
drivers/infiniband/ulp/rtrs/rtrs-clt.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
index b6ee801fd0ff..07261523c554 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
@@ -775,7 +775,7 @@ rtrs_clt_get_next_path_or_null(struct list_head *head, struct rtrs_clt_path *clt
* Related to @MP_POLICY_RR
*
* Locks:
- * rcu_read_lock() must be hold.
+ * rcu_read_lock() must be held.
*/
static struct rtrs_clt_path *get_next_path_rr(struct path_it *it)
{
@@ -783,6 +783,11 @@ static struct rtrs_clt_path *get_next_path_rr(struct path_it *it)
struct rtrs_clt_path *path;
struct rtrs_clt_sess *clt;
+ /*
+ * Assert that rcu lock must be held
+ */
+ RCU_LOCKDEP_WARN(!rcu_read_lock_held(), "no rcu read lock held");
+
clt = it->clt;
/*
--
2.27.0
