Re: arm64: Fix size of __early_cpu_boot_status

[Will Deacon]

On Tue, Apr 30, 2019 at 04:05:04PM +0530, Arun KS wrote:
> __early_cpu_boot_status is of type long. Use quad
> assembler directive to allocate proper size.
> 
> Signed-off-by: Arun KS <arunks@xxxxxxxxxxxxxx>
> ---
>  arch/arm64/kernel/head.S | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S
> index eecf792..115f332 100644
> --- a/arch/arm64/kernel/head.S
> +++ b/arch/arm64/kernel/head.S
> @@ -684,7 +684,7 @@ ENTRY(__boot_cpu_mode)
>   * with MMU turned off.
>   */
>  ENTRY(__early_cpu_boot_status)
> -	.long 	0
> +	.quad 	0

Yikes. How did you spot this? Did we end up corrupting an adjacent variable,
or does the alignment in the linker script save us in practice?

Will