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authorMing Lei <ming.lei@redhat.com>2023-11-17 05:35:23 +0300
committerJens Axboe <axboe@kernel.dk>2023-11-17 20:48:58 +0300
commit35a99d6557cacbc177314735342f77a2dda41872 (patch)
treed1b6782237525cbe86009fcd80ca57ff493b7c21 /block
parent27b13e209ddca5979847a1b57890e0372c1edcee (diff)
downloadlinux-35a99d6557cacbc177314735342f77a2dda41872.tar.xz
blk-cgroup: avoid to warn !rcu_read_lock_held() in blkg_lookup()
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@redhat.com> Fixes: 83462a6c971c ("blkcg: Drop unnecessary RCU read [un]locks from blkg_conf_prep/finish()") Signed-off-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20231117023527.3188627-3-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk-cgroup.h2
1 files changed, 0 insertions, 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;