Linux-Block Archive on lore.kernel.org
 help / color / Atom feed
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, linux-block@vger.kernel.org,
	kernel-team@fb.com, cgroups@vger.kernel.org, ast@kernel.org,
	daniel@iogearbox.net, kafai@fb.com, songliubraving@fb.com,
	yhs@fb.com, bpf@vger.kernel.org, Tejun Heo <tj@kernel.org>
Subject: [PATCH 02/10] blkcg: make ->cpd_init_fn() optional
Date: Thu, 13 Jun 2019 18:56:12 -0700
Message-ID: <20190614015620.1587672-3-tj@kernel.org> (raw)
In-Reply-To: <20190614015620.1587672-1-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 30d3a0fbccac..60ad9b96e6eb 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -1534,7 +1534,8 @@ 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


  parent reply index

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
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 01/10] blkcg: pass @q and @blkcg into blkcg_pol_alloc_pd_fn() Tejun Heo
2019-06-14  1:56 ` Tejun Heo [this message]
2019-06-14  1:56 ` [PATCH 03/10] blkcg: separate blkcg_conf_get_disk() out of blkg_conf_prep() Tejun Heo
2019-06-14  1:56 ` [PATCH 04/10] block/rq_qos: add rq_qos_merge() Tejun Heo
2019-06-14  1:56 ` [PATCH 05/10] block/rq_qos: implement rq_qos_ops->queue_depth_changed() Tejun Heo
2019-06-14  1:56 ` [PATCH 06/10] blkcg: s/RQ_QOS_CGROUP/RQ_QOS_LATENCY/ Tejun Heo
2019-06-14  1:56 ` [PATCH 07/10] blk-mq: add optional request->pre_start_time_ns Tejun Heo
2019-06-14  1:56 ` [PATCH 08/10] blkcg: implement blk-ioweight Tejun Heo
2019-06-14 12:17   ` Toke Høiland-Jørgensen
2019-06-14 15:09     ` Tejun Heo
2019-06-14 20:50       ` Toke Høiland-Jørgensen
2019-06-15 15:57         ` Tejun Heo
2019-06-14  1:56 ` [PATCH 09/10] blkcg: add tools/cgroup/monitor_ioweight.py Tejun Heo
2019-06-14  1:56 ` [PATCH 10/10] blkcg: implement BPF_PROG_TYPE_IO_COST Tejun Heo
2019-06-14 11:32   ` Quentin Monnet
2019-06-14 14:52     ` Tejun Heo
2019-06-14 16:35       ` Alexei Starovoitov
2019-06-14 17:09         ` Tejun Heo
2019-06-14 17:56 ` [PATCHSET block/for-next] IO cost model based work-conserving porportional controller Tejun Heo
2019-08-20 10:48   ` Paolo Valente
2019-08-20 15:04     ` Paolo Valente
2019-08-20 15:19       ` Tejun Heo
2019-08-22  8:58         ` Paolo Valente
2019-08-31  6:53           ` Tejun Heo
2019-08-31  7:10             ` Paolo Valente
2019-08-31 11:20               ` Tejun Heo
2019-09-02 15:45             ` Paolo Valente
2019-09-02 15:56               ` Tejun Heo
2019-09-02 19:43                 ` Paolo Valente
2019-09-05 16:55                   ` Tejun Heo
2019-09-06  9:07                     ` Paolo Valente
2019-09-06 14:58                       ` Tejun Heo
2019-07-10 20:51 [PATCHSET v2 block/for-linus] " Tejun Heo
2019-07-10 20:51 ` [PATCH 02/10] blkcg: make ->cpd_init_fn() optional Tejun Heo
2019-08-28 22:05 [PATCHSET v3 block/for-linus] IO cost model based work-conserving porportional controller Tejun Heo
2019-08-28 22:05 ` [PATCH 02/10] blkcg: make ->cpd_init_fn() optional Tejun Heo

Reply instructions:

You may reply publically to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20190614015620.1587672-3-tj@kernel.org \
    --to=tj@kernel.org \
    --cc=ast@kernel.org \
    --cc=axboe@kernel.dk \
    --cc=bpf@vger.kernel.org \
    --cc=cgroups@vger.kernel.org \
    --cc=clm@fb.com \
    --cc=daniel@iogearbox.net \
    --cc=dennisz@fb.com \
    --cc=hannes@cmpxchg.org \
    --cc=josef@toxicpanda.com \
    --cc=kafai@fb.com \
    --cc=kernel-team@fb.com \
    --cc=linux-block@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=lizefan@huawei.com \
    --cc=newella@fb.com \
    --cc=songliubraving@fb.com \
    --cc=yhs@fb.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-Block Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-block/0 linux-block/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-block linux-block/ https://lore.kernel.org/linux-block \
		linux-block@vger.kernel.org linux-block@archiver.kernel.org
	public-inbox-index linux-block


Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-block


AGPL code for this site: git clone https://public-inbox.org/ public-inbox