Commit 52cf373c authored Nov 28, 2017 by Lucas Stach Committed by Tejun Heo Nov 28, 2017

cgroup: properly init u64_stats



Lockdep complains that the stats update is trying to register a non-static
key. This is because u64_stats are using a seqlock on 32bit arches, which
needs to be initialized before usage.

Fixes: 041cd640 (cgroup: Implement cgroup2 basic CPU usage accounting)
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Tejun Heo <tj@kernel.org>

parent ddf7005f

kernel/cgroup/stat.c

+6 −2

Original line number	Diff line number	Diff line
		@@ -296,8 +296,12 @@ int cgroup_stat_init(struct cgroup *cgrp)
		}

		/* ->updated_children list is self terminated */
		for_each_possible_cpu(cpu)
		cgroup_cpu_stat(cgrp, cpu)->updated_children = cgrp;
		for_each_possible_cpu(cpu) {
		struct cgroup_cpu_stat *cstat = cgroup_cpu_stat(cgrp, cpu);

		cstat->updated_children = cgrp;
		u64_stats_init(&cstat->sync);
		}

		prev_cputime_init(&cgrp->stat.prev_cputime);

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