Merge branch 'for-5.4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

Pull cgroup fix from Tejun Heo:
 "There's an inadvertent preemption point in ptrace_stop() which was
  reliably triggering for a test scenario significantly slowing it down.

  This contains Oleg's fix to remove the unwanted preemption point"

* 'for-5.4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup: freezer: call cgroup_enter_frozen() with preemption disabled in ptrace_stop()