Question: Takes about 2s in sched_clock_init() when kernel boots

[Younger Liu]

Hi,
  When I analyse boot time on ArmV7, I found that it takes
about 2s in sched_clock_init(), the log is as follow:
[    0.000000] before:sched_clock_init.
[    0.000000] start:sched_clock_init.
[    2.100505] end  :sched_clock_init.
[    2.103983] before:calibrate_delay.

  In my config, CONFIG_HAVE_UNSTABLE_SCHED_CLOCK does not config.

  Are there any suggestions?

	Younger
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