[PATCH 0/6] ARM: tegra114: add CPU hotplug support

[Stephen Warren]

On 05/15/2013 04:27 AM, Joseph Lo wrote:
> Tegra 114 is different with other Tegra SoC chips. It using ARM Cortex-A15
> as CPU core and a enhanced flow controller for CPU power control. So
> we need to skip some code that was for Contex-A9 and some other support
> code that was for other Tegra SoC chips. Then adding the proper power up
> and hot plug control for Tegra114.

This series mostly works OK, but I see one problem: I can't hotunplug
CPU0, which the commit descriptions and code changes imply I should be
able to do:

root at localhost:~# echo 0 > /sys/devices/system/cpu/cpu0/online
-bash: echo: write error: Operation not permitted