Re: [PATCH v7 05/17] ARM64 / ACPI: If we chose to boot from acpi then disable FDT

[Catalin Marinas]

On Wed, Jan 14, 2015 at 03:04:53PM +0000, Hanjun Guo wrote:
> From: Graeme Gregory <graeme.gregory@xxxxxxxxxx>
> 
> If the early boot methods of acpi are happy that we have valid ACPI
> tables and acpi=force has been passed, then do not unflat devicetree
> effectively disabling further hardware probing from DT.
> 
> Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx>
> Tested-by: Yijing Wang <wangyijing@xxxxxxxxxx>
> Signed-off-by: Graeme Gregory <graeme.gregory@xxxxxxxxxx>
> Signed-off-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
> ---
>  arch/arm64/kernel/setup.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
> index 4580ed3..5d139e1 100644
> --- a/arch/arm64/kernel/setup.c
> +++ b/arch/arm64/kernel/setup.c
> @@ -411,7 +411,8 @@ void __init setup_arch(char **cmdline_p)
>  	efi_idmap_init();
>  	early_ioremap_reset();
>  
> -	unflatten_device_tree();
> +	if (acpi_disabled)
> +		unflatten_device_tree();

Nitpick: you could actually squash this patch into the previous one to
keep the acpi disable/enable logic in one place.

-- 
Catalin
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