Li Zefan 805194c35b sched: partly revert "sched debug: remove NULL checking in print_cfs_rt_rq()" ...

Impact: avoid accessing NULL tg.css->cgroup

In commit 0a0db8f5c9, I removed checking
NULL tg.css->cgroup, but I realized I was wrong when I found reading
/proc/sched_debug can race with cgroup_create().

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2009-01-11 02:40:32 +01:00

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