sched: Misc preps for cgroup unified hierarchy interface

Make the following changes in preparation for the cpu controller
interface implementation for the unified hierarchy.  This patch
doesn't cause any functional differences.

* s/cpu_stats_show()/cpu_cfs_stats_show()/

* s/cpu_files/cpu_legacy_files/

* Separate out cpuacct_stats_read() from cpuacct_stats_show().  While
  at it, remove pointless cpuacct_stat_desc[] array.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
2 files changed