[CFT] Always enable SMP mode on MP capable CPUs

[Fabio Estevam]

On Thu, May 18, 2017 at 3:09 PM, Fabio Estevam <festevam at gmail.com> wrote:

> I tested this patch on a mx6ul, which is CortexA7 UP using USB serial
> download mode.
>
> In this boot mode the ROM code does not set the SMP bit and I can
> notice a very slow boot progress with CONFIG_SMP=n with an original
> 4.12-rc1.
>
> With this patch applied it boots with the correct speed, so:

However the kernel still takes a long time to decompress when the
bootloader or ROM does not set the SMP bit.

After it decompress, then it boots quickly.

Should the SMP bit be set inside arch/arm/boot/compressed/head.S?

Thanks