arm64: kernel: use ordinary return/argument register for el2_setup()

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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.

Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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Ard Biesheuvel 2016-08-31 12:05:12 +01:00 • committed by Will Deacon

parent b5fe242972

commit 23c8a500c2

1 changed files with 7 additions and 7 deletions

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