[PATCH v2 3/9] arm64: kernel: use ordinary return/argument register for el2_setup()

[Mark Rutland]

On Wed, Aug 24, 2016 at 04:36:00PM +0200, Ard Biesheuvel wrote:
> The function el2_setup() passes its return value in register w20, and
> in the two cases where the caller actually cares about this return value,
> it is passed into set_cpu_boot_mode_flag() [almost] directly, which
> expects its input in w20 as well.
> 
> So there is no reason to use a 'special' callee saved register here, but
> we can simply follow the PCS for return value and first argument,
> respectively.
> 
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel at linaro.org>

Make sense to me. FWIW:

Reviewed-by: Mark Rutland <mark.rutland at arm.com>

Mark.