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authorPaolo Valente <paolo.valente@linaro.org>2020-02-03 11:40:59 +0100
committerJens Axboe <axboe@kernel.dk>2020-02-03 06:58:15 -0700
commitdb37a34c563bf4692b36990ae89005c031385e52 (patch)
treecf3b9bf508cb90dc60cfed10d4c27600c218e556 /block/bfq-iosched.h
parent4d8340d0d4d90e7ca367d18ec16c2fefa89a339c (diff)
block, bfq: get a ref to a group when adding it to a service tree
BFQ schedules generic entities, which may represent either bfq_queues or groups of bfq_queues. When an entity is inserted into a service tree, a reference must be taken, to make sure that the entity does not disappear while still referred in the tree. Unfortunately, such a reference is mistakenly taken only if the entity represents a bfq_queue. This commit takes a reference also in case the entity represents a group. Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name> Tested-by: Chris Evich <cevich@redhat.com> Signed-off-by: Paolo Valente <paolo.valente@linaro.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bfq-iosched.h')
-rw-r--r--block/bfq-iosched.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/block/bfq-iosched.h b/block/bfq-iosched.h
index 2c7cec737b2a..d1233af9c684 100644
--- a/block/bfq-iosched.h
+++ b/block/bfq-iosched.h
@@ -985,6 +985,7 @@ struct bfq_group *bfq_find_set_group(struct bfq_data *bfqd,
struct blkcg_gq *bfqg_to_blkg(struct bfq_group *bfqg);
struct bfq_group *bfqq_group(struct bfq_queue *bfqq);
struct bfq_group *bfq_create_group_hierarchy(struct bfq_data *bfqd, int node);
+void bfqg_and_blkg_get(struct bfq_group *bfqg);
void bfqg_and_blkg_put(struct bfq_group *bfqg);
#ifdef CONFIG_BFQ_GROUP_IOSCHED