block, bfq: remove BFQ_WEIGHT_LEGACY_DFL

BFQ_WEIGHT_LEGACY_DFL is the same as CGROUP_WEIGHT_DFL, which means
we don't need cpd_bind_fn() callback to update default weight when
attached to a hierarchy.

This patch remove BFQ_WEIGHT_LEGACY_DFL and cpd_bind_fn().

Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20230406145050.49914-2-zhouchengming@bytedance.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/bfq-cgroup.c b/block/bfq-cgroup.c
index 89ffb3a..a2ab5dd 100644 (file)
--- a/block/bfq-cgroup.c
+++ b/block/bfq-cgroup.c
@@ -504,8 +504,7 @@ static void bfq_cpd_init(struct blkcg_policy_data *cpd)
 {
        struct bfq_group_data *d = cpd_to_bfqgd(cpd);
 
-       d->weight = cgroup_subsys_on_dfl(io_cgrp_subsys) ?
-               CGROUP_WEIGHT_DFL : BFQ_WEIGHT_LEGACY_DFL;
+       d->weight = CGROUP_WEIGHT_DFL;
 }
 
 static void bfq_cpd_free(struct blkcg_policy_data *cpd)
@@ -1302,7 +1301,6 @@ struct blkcg_policy blkcg_policy_bfq = {
 
        .cpd_alloc_fn           = bfq_cpd_alloc,
        .cpd_init_fn            = bfq_cpd_init,
-       .cpd_bind_fn            = bfq_cpd_init,
        .cpd_free_fn            = bfq_cpd_free,
 
        .pd_alloc_fn            = bfq_pd_alloc,

diff --git a/block/bfq-iosched.h b/block/bfq-iosched.h
index 69aaee5..467e8cf 100644 (file)
--- a/block/bfq-iosched.h
+++ b/block/bfq-iosched.h
@@ -20,7 +20,6 @@
 
 #define BFQ_DEFAULT_QUEUE_IOPRIO       4
 
-#define BFQ_WEIGHT_LEGACY_DFL  100
 #define BFQ_DEFAULT_GRP_IOPRIO 0
 #define BFQ_DEFAULT_GRP_CLASS  IOPRIO_CLASS_BE