Re: [PATCH 1/5] sched: Convert thread_group_cputime() to use for_each_thread()

[Peter Zijlstra]

On Wed, Apr 09, 2014 at 06:11:18PM +0200, Frederic Weisbecker wrote:
> do_each_thread/while_each_thread iterators are deprecated by
> for_each_thread/for_each_process_thread() APIs.
> 
> Lets convert the callers in the cputime code accounting. The ultimate
> goal is to remove the struct task_struct::thread_group field and
> the corresponding do_each_thread/while_each_thread iterators that are
> RCU unsafe.
> 
> It also makes thread_group_cputime() eventually RCU-safe.

this fails to explain how the current code is broken.
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