From: Tejun Heo <tj@kernel.org>
To: axboe@kernel.dk, newella@fb.com, clm@fb.com,
josef@toxicpanda.com, dennisz@fb.com, lizefan@huawei.com,
hannes@cmpxchg.org
Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com,
linux-block@vger.kernel.org, cgroups@vger.kernel.org,
Tejun Heo <tj@kernel.org>
Subject: [PATCH 02/10] blkcg: make ->cpd_init_fn() optional
Date: Wed, 10 Jul 2019 13:51:20 -0700 [thread overview]
Message-ID: <20190710205128.1316483-3-tj@kernel.org> (raw)
In-Reply-To: <20190710205128.1316483-1-tj@kernel.org>
For policies which can do enough initialization from ->cpd_alloc_fn(),
make ->cpd_init_fn() optional.
Signed-off-by: Tejun Heo <tj@kernel.org>
---
block/blk-cgroup.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 75f7f78b87b2..818e50b4cc7a 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -1478,7 +1478,8 @@ int blkcg_policy_register(struct blkcg_policy *pol)
blkcg->cpd[pol->plid] = cpd;
cpd->blkcg = blkcg;
cpd->plid = pol->plid;
- pol->cpd_init_fn(cpd);
+ if (pol->cpd_init_fn)
+ pol->cpd_init_fn(cpd);
}
}
--
2.17.1
next prev parent reply other threads:[~2019-07-10 20:51 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-10 20:51 [PATCHSET v2 block/for-linus] IO cost model based work-conserving porportional controller Tejun Heo
2019-07-10 20:51 ` [PATCH 01/10] blkcg: pass @q and @blkcg into blkcg_pol_alloc_pd_fn() Tejun Heo
2019-07-10 20:51 ` Tejun Heo [this message]
2019-07-10 20:51 ` [PATCH 03/10] blkcg: separate blkcg_conf_get_disk() out of blkg_conf_prep() Tejun Heo
2019-07-10 20:51 ` [PATCH 04/10] block/rq_qos: add rq_qos_merge() Tejun Heo
2019-07-10 20:51 ` [PATCH 05/10] block/rq_qos: implement rq_qos_ops->queue_depth_changed() Tejun Heo
2019-07-10 20:51 ` [PATCH 06/10] blkcg: s/RQ_QOS_CGROUP/RQ_QOS_LATENCY/ Tejun Heo
2019-07-10 20:51 ` [PATCH 07/10] blk-mq: add optional request->pre_start_time_ns Tejun Heo
2019-07-10 20:51 ` [PATCH 08/10] blkcg: implement blk-iocost Tejun Heo
2019-07-10 20:51 ` [PATCH 09/10] blkcg: add tools/cgroup/iocost_monitor.py Tejun Heo
2019-07-10 20:51 ` [PATCH 10/10] blkcg: add tools/cgroup/iocost_coef_gen.py Tejun Heo
2019-07-10 21:21 ` [PATCH 11/10] block: omit request->pre_start_time_ns if !CONFIG_BLK_CGROUP_IOCOST work-conserving porportional controller Tejun Heo
-- strict thread matches above, loose matches on Subject: below --
2019-08-28 22:05 [PATCHSET v3 block/for-linus] IO cost model based " Tejun Heo
2019-08-28 22:05 ` [PATCH 02/10] blkcg: make ->cpd_init_fn() optional Tejun Heo
2019-06-14 1:56 [PATCHSET block/for-next] IO cost model based work-conserving porportional controller Tejun Heo
2019-06-14 1:56 ` [PATCH 02/10] blkcg: make ->cpd_init_fn() optional Tejun Heo
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