linux-kernel - Re: [PATCH 1/5] cgroup: record ancestor IDs and reimplement cgroup_is

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Date:	Tue, 17 Nov 2015 23:54:54 +0100 (CET)
From:	Jan Engelhardt <jengelh@...i.de>
To:	Tejun Heo <tj@...nel.org>
cc:	davem@...emloft.net, pablo@...filter.org, kaber@...sh.net,
	kadlec@...ckhole.kfki.hu, lizefan@...wei.com, hannes@...xchg.org,
	netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
	coreteam@...filter.org, cgroups@...r.kernel.org,
	linux-kernel@...r.kernel.org, kernel-team@...com,
	daniel@...earbox.net, daniel.wagner@...-carit.de,
	nhorman@...driver.com
Subject: Re: [PATCH 1/5] cgroup: record ancestor IDs and reimplement
 cgroup_is_descendant() using it


On Tuesday 2015-11-17 20:40, Tejun Heo wrote:
>+static inline bool cgroup_is_descendant(struct cgroup *cgrp,
>+					struct cgroup *ancestor)

(const struct group *cgrp, const struct group *ancestor)

>+{
>+	if (cgrp->root != ancestor->root || cgrp->level < ancestor->level)
>+		return false;
>+	return cgrp->ancestor_ids[ancestor->level] == ancestor->id;
>+}
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