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

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 <redacted>

Make sense to me. FWIW:

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

Mark.