Fixed the issue that nr_cgroup and cpuctx->cgrp of the perf cgroup event
are not correctly updated. And Fixed the possible concurrency of
perf_cgroup_switch and perf_cgroup_event_disable.

Luo Gengkun (2):
  perf/core: Fix nr_cgroups/cpuctx->cgrp is not updated correctly
  perf/core: Fix WARN_ON_ONCE(cpuctx->ctx.nr_cgroups == 0) in
    perf_cgroup_switch

 kernel/events/core.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

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2.34.1