blkio: Propagate cgroup weight updation to cfq groups

o Propagate blkio cgroup weight updation to associated cfq groups.

Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 3d99e45789bd..f7364621613a 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -922,6 +922,12 @@ static inline struct cfq_group *cfqg_of_blkg(struct blkio_group *blkg)
         return NULL;
 }
 
+void
+cfq_update_blkio_group_weight(struct blkio_group *blkg, unsigned int weight)
+{
+        cfqg_of_blkg(blkg)->weight = weight;
+}
+
 static struct cfq_group *
 cfq_find_alloc_cfqg(struct cfq_data *cfqd, struct cgroup *cgroup, int create)
 {