Re: [PATCH] sched: partly revert "sched debug: remove NULLchecking in print_cfs_rt_rq()"

[Ingo Molnar]

* Li Zefan <lizf@xxxxxxxxxxxxxx> wrote:

> Impact: avoid accessing NULL tg.css->cgroup
> 
> In commit 0a0db8f5c9d4bbb9bbfcc2b6cb6bce2d0ef4d73d, 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@xxxxxxxxxxxxxx>
> ---
>  kernel/sched_debug.c |   21 +++++++++++++++++----
>  1 files changed, 17 insertions(+), 4 deletions(-)

applied to tip/sched/urgent, thanks!

	Ingo
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