[PATCH] arm64: head.S: fix up stale comments

[Ard Biesheuvel]

On 9 January 2017 at 14:31, Mark Rutland <mark.rutland at arm.com> wrote:
> In commit 23c8a500c24d02dd ("arm64: kernel: use ordinary return/argument
> register for el2_setup()"), we stopped using w20 as a global stash of
> the boot mode flag, and instead pass this around in w0 as a function
> parameter.
>
> Unfortunately, we missed a couple of comments, which still refer to the
> old convention of using w20/x20.
>
> This patch fixes up the comments to describe the code as it currently
> works.
>

Ah yes, apologies for the sloppiness

Acked-by: Ard Biesheuvel <ard.biesheuvel at linaro.org>

> Signed-off-by: Mark Rutland <mark.rutland at arm.com>
> Cc: Ard Biesheuvel <ard.biesheuvel at linaro.org>
> Cc: Catalin Marinas <catalin.marinas at arm.com>
> Cc: Will Deacon <will.deacon at arm.com>
> ---
>  arch/arm64/kernel/head.S | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S
> index 4b1abac..9b0857a 100644
> --- a/arch/arm64/kernel/head.S
> +++ b/arch/arm64/kernel/head.S
> @@ -483,7 +483,7 @@ ENTRY(kimage_vaddr)
>   * If we're fortunate enough to boot at EL2, ensure that the world is
>   * sane before dropping to EL1.
>   *
> - * Returns either BOOT_CPU_MODE_EL1 or BOOT_CPU_MODE_EL2 in x20 if
> + * Returns either BOOT_CPU_MODE_EL1 or BOOT_CPU_MODE_EL2 in w0 if
>   * booted in EL1 or EL2 respectively.
>   */
>  ENTRY(el2_setup)
> @@ -628,7 +628,7 @@ ENDPROC(el2_setup)
>
>  /*
>   * Sets the __boot_cpu_mode flag depending on the CPU boot mode passed
> - * in x20. See arch/arm64/include/asm/virt.h for more info.
> + * in w0. See arch/arm64/include/asm/virt.h for more info.
>   */
>  set_cpu_boot_mode_flag:
>         adr_l   x1, __boot_cpu_mode
> --
> 1.9.1
>