@@ -62,7 +62,6 @@ struct ioprio_blkg {
struct ioprio_blkcg {
struct blkcg_policy_data cpd;
enum prio_policy prio_policy;
- bool prio_set;
};
static inline struct ioprio_blkg *pd_to_ioprio(struct blkg_policy_data *pd)
@@ -113,7 +112,6 @@ static ssize_t ioprio_set_prio_policy(struct kernfs_open_file *of, char *buf,
if (ret < 0)
return ret;
blkcg->prio_policy = ret;
- blkcg->prio_set = true;
return nbytes;
}
@@ -193,16 +191,15 @@ static void blkcg_ioprio_track(struct rq_qos *rqos, struct request *rq,
struct ioprio_blkcg *blkcg = ioprio_blkcg_from_bio(bio);
u16 prio;
- if (!blkcg->prio_set)
+ if (blkcg->prio_policy == POLICY_NO_CHANGE)
return;
/*
* Except for IOPRIO_CLASS_NONE, higher I/O priority numbers
* correspond to a lower priority. Hence, the max_t() below selects
* the lower priority of bi_ioprio and the cgroup I/O priority class.
- * If the cgroup policy has been set to POLICY_NO_CHANGE == 0, the
- * bio I/O priority is not modified. If the bio I/O priority equals
- * IOPRIO_CLASS_NONE, the cgroup I/O priority is assigned to the bio.
+ * If the bio I/O priority equals IOPRIO_CLASS_NONE, the cgroup I/O
+ * priority is assigned to the bio.
*/
prio = max_t(u16, bio->bi_ioprio,
IOPRIO_PRIO_VALUE(blkcg->prio_policy, 0));
blkcg->ioprio_set field is not really useful except for avoiding possibly more expensive checks inside blkcg_ioprio_track(). The check for blkcg->prio_policy being equal to POLICY_NO_CHANGE does the same service so just remove the ioprio_set field and replace the check. Signed-off-by: Jan Kara <jack@suse.cz> --- block/blk-ioprio.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-)