cgroup: fix incorrect WARN_ON_ONCE() in cgroup_setup_root()

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743210386c ("cgroup: use cgrp->kn->id as the cgroup ID") added WARN
which triggers if cgroup_id(root_cgrp) is not 1.  This is fine on
64bit ino archs but on 32bit archs cgroup ID is ((gen << 32) | ino)
and gen starts at 1, so the root id is 0x1_0000_0001 instead of 1
always triggering the WARN.

What we wanna make sure is that the ino part is 1.  Fix it.

Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Fixes: 743210386c ("cgroup: use cgrp->kn->id as the cgroup ID")
Signed-off-by: Tejun Heo <tj@kernel.org>

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Tejun Heo 2019-11-14 14:46:51 -08:00

parent 743210386c

commit d749534322

1 changed files with 1 additions and 1 deletions

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kernel/cgroup/cgroup.c

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