From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wei Yang Subject: [PATCH 4/4] cgroup: use parent directly instead of cgroup_parent() Date: Mon, 4 Oct 2021 08:49:28 +0000 Message-ID: <20211004084928.17622-4-richard.weiyang@gmail.com> References: <20211004084928.17622-1-richard.weiyang@gmail.com> Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=OexIHL7yzlEUfmmS4I0SOBuDrj/gY0LWs9jL52+pYx8=; b=dVemWq3a+2beKnz+1YiJJNW7FjJjN+OMKxBI84+hIT78TOpTeokN1DKavY06NryK/G NSlkpM3BEIz/E0QR0Vuc1mDjYlW2qc1JQNFOx+uPebZib3UiQj5abKYXuW2qS6/CFWXw 9ekjXV0RAfOt9Z/qAg14xStUshEMGk6hfUd5u7jhudiQdowDJ7WpYKwaTkPx8bXwIcHU CAOrs1p0ezq+CElVjzy/BjgVVOdKTohTdD31IHlhuQrjkGYO8VsGRwtkJ1CXydpypGPD ENSepy47rm13rLAIbt02xFUF42yUX/VjML4/KvrY/JsnMN9iz7sukRqSYIuX/rp+dqBt jBDg== In-Reply-To: <20211004084928.17622-1-richard.weiyang-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> List-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, lizefan.x-EC8Uxl6Npydl57MIdRCFDg@public.gmane.org, hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org Cc: cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Wei Yang 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 --- 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