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    Subject[PATCH v3 04/17] arm64: kernel: avoid x18 __cpu_soft_restart
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    From: Ard Biesheuvel <ard.biesheuvel@linaro.org>

    The code in __cpu_soft_restart() uses x18 as an arbitrary temp register,
    which will shortly be disallowed. So use x8 instead.

    Link: https://patchwork.kernel.org/patch/9836877/
    Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
    Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
    Reviewed-by: Mark Rutland <mark.rutland@arm.com>
    ---
    arch/arm64/kernel/cpu-reset.S | 4 ++--
    1 file changed, 2 insertions(+), 2 deletions(-)

    diff --git a/arch/arm64/kernel/cpu-reset.S b/arch/arm64/kernel/cpu-reset.S
    index 6ea337d464c4..32c7bf858dd9 100644
    --- a/arch/arm64/kernel/cpu-reset.S
    +++ b/arch/arm64/kernel/cpu-reset.S
    @@ -42,11 +42,11 @@ ENTRY(__cpu_soft_restart)
    mov x0, #HVC_SOFT_RESTART
    hvc #0 // no return

    -1: mov x18, x1 // entry
    +1: mov x8, x1 // entry
    mov x0, x2 // arg0
    mov x1, x3 // arg1
    mov x2, x4 // arg2
    - br x18
    + br x8
    ENDPROC(__cpu_soft_restart)

    .popsection
    --
    2.24.0.rc0.303.g954a862665-goog
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