Re: [RFC PATCH v1 1/1] acpi/hmat: preserve hmat_adist_nb notifier block

[Dave Jiang <dave.jiang@intel.com>]

On 6/30/26 7:35 AM, alejandro.lucero-palau@amd.com wrote:
> From: Alejandro Lucero <alucerop@amd.com>
> 
> Remove __meminitdata from hmat_adist_nb declaration preserving it even
> when CONFIG_MEMORY_HOTPLUG is not set. Otherwise further notifier
> registrations using register_mt_adistance_algorithm() will find a
> notifier chain likely corrupted. This is the case when a CXL Type2
> driver will load after kernel initialization and a CXL region created from
> its committed HDM decoders registers an mt_adistance_algorithm notifier.
> 
> Signed-off-by: Alejandro Lucero <alucerop@amd.com>
> ---
>  drivers/acpi/numa/hmat.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/acpi/numa/hmat.c b/drivers/acpi/numa/hmat.c
> index 9792dc394756..3006789ae31f 100644
> --- a/drivers/acpi/numa/hmat.c
> +++ b/drivers/acpi/numa/hmat.c
> @@ -995,7 +995,7 @@ static int hmat_calculate_adistance(struct notifier_block *self,
>  	return NOTIFY_STOP;
>  }
>  
> -static struct notifier_block hmat_adist_nb __meminitdata = {
> +static struct notifier_block hmat_adist_nb = {

Maybe do something similar to __init_or_acpilib in include/linux/acpi.h?

>  	.notifier_call = hmat_calculate_adistance,
>  	.priority = 100,
>  };