[PATCH 3.16 066/306] blkcg: Annotate blkg_hint correctly

Ben Hutchings
2017-02-15T23:28:06Z

From: Bart Van Assche <bart.vanassche@sandisk.com>

commit 55679c8d23d191c24ad133abc5647e3054ca8de1 upstream.

Avoid that sparse complains about blkg_hint manipulations.

Fixes: a637120e4902 ("blkcg: use radix tree to index blkgs from blkcg")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
[bwh: Backported to 3.16: adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
block/blk-cgroup.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -47,7 +47,7 @@ struct blkcg {
spinlock_t lock;

struct radix_tree_root blkg_tree;
- struct blkcg_gq *blkg_hint;
+ struct blkcg_gq __rcu *blkg_hint;
struct hlist_head blkg_list;

/* for policies to test whether associated blkcg has changed */