From e67708823d7362cfbb557008563cce7e7c9c5128 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Sun, 21 Sep 2025 15:32:40 -1000 Subject: [PATCH] sched_ext: Use rhashtable_lookup() instead of rhashtable_lookup_fast() The find_user_dsq() function is called from contexts that are already under RCU read lock protection. Switch from rhashtable_lookup_fast() to rhashtable_lookup() to avoid redundant RCU locking. Requires: bee8a520eb84 ("rhashtable: Use rcu_dereference_all and rcu_dereference_all_check") Acked-by: Andrea Righi Signed-off-by: Tejun Heo --- kernel/sched/ext.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c index 04079ae4246e3..bde49e47f1e4b 100644 --- a/kernel/sched/ext.c +++ b/kernel/sched/ext.c @@ -200,7 +200,7 @@ static struct scx_dispatch_q *find_global_dsq(struct scx_sched *sch, static struct scx_dispatch_q *find_user_dsq(struct scx_sched *sch, u64 dsq_id) { - return rhashtable_lookup_fast(&sch->dsq_hash, &dsq_id, dsq_hash_params); + return rhashtable_lookup(&sch->dsq_hash, &dsq_id, dsq_hash_params); } /* -- 2.47.3