From: Wei Yang <richard.weiyang@gmail.com>
To: tj@kernel.org, lizefan.x@bytedance.com, hannes@cmpxchg.org
Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org,
Wei Yang <richard.weiyang@gmail.com>
Subject: [PATCH 4/4] cgroup: use parent directly instead of cgroup_parent()
Date: Mon, 4 Oct 2021 08:49:28 +0000 [thread overview]
Message-ID: <20211004084928.17622-4-richard.weiyang@gmail.com> (raw)
In-Reply-To: <20211004084928.17622-1-richard.weiyang@gmail.com>
During cgroup_create(), we are sure who is our parent.
Let's use parent directly instead of fetch it from cgroup hierarchy.
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
---
kernel/cgroup/cgroup.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 457353aeb0ca..694b1c7803c2 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -5368,7 +5368,7 @@ static struct cgroup *cgroup_create(struct cgroup *parent, const char *name,
cgrp->self.serial_nr = css_serial_nr_next++;
/* allocation complete, commit to creation */
- list_add_tail_rcu(&cgrp->self.sibling, &cgroup_parent(cgrp)->self.children);
+ list_add_tail_rcu(&cgrp->self.sibling, &parent->self.children);
atomic_inc(&root->nr_cgrps);
cgroup_get_live(parent);
--
2.23.0
next prev parent reply other threads:[~2021-10-04 8:49 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-04 8:49 [PATCH 1/4] cgroup: a u16 is enough for cgroup_subsys.depends_on Wei Yang
2021-10-04 8:49 ` [PATCH 2/4] cgroup: reorder cgroup_subsys fields to save 8 byte Wei Yang
2021-10-04 8:49 ` [PATCH 3/4] cgroup: simplify the cgroup descendant helper Wei Yang
2021-10-04 8:49 ` Wei Yang [this message]
2021-10-04 16:30 ` [PATCH 1/4] cgroup: a u16 is enough for cgroup_subsys.depends_on Tejun Heo
Reply instructions:
You may reply publicly 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=20211004084928.17622-4-richard.weiyang@gmail.com \
--to=richard.weiyang@gmail.com \
--cc=cgroups@vger.kernel.org \
--cc=hannes@cmpxchg.org \
--cc=linux-kernel@vger.kernel.org \
--cc=lizefan.x@bytedance.com \
--cc=tj@kernel.org \
/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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®