So far, all callers either holds spin lock or rcu read explicitly, and
most of the caller has added WARN_ON_ONCE(!rcu_read_lock_held()) or
lockdep_assert_held(&disk->queue->queue_lock).
Remove WARN_ON_ONCE(!rcu_read_lock_held()) from blkg_lookup() for
killing the false positive warning from blkg_conf_prep().
Reported-by: Changhui Zhong <czhong@xxxxxxxxxx>
Fixes: 83462a6c971c ("blkcg: Drop unnecessary RCU read [un]locks from blkg_conf_prep/finish()")
Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
---
block/blk-cgroup.h | 2 --
1 file changed, 2 deletions(-)
diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index 624c03c8fe64..fd482439afbc 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -249,8 +249,6 @@ static inline struct blkcg_gq *blkg_lookup(struct blkcg *blkcg,
{
struct blkcg_gq *blkg;
- WARN_ON_ONCE(!rcu_read_lock_held());
-
if (blkcg == &blkcg_root)
return q->root_blkg;
--
2.41.0
