Re: [PATCH v2 1/1] acpi/hmat: preserve hmat_adist_nb notifier block

On 7/16/26 11:11 AM, [email protected] wrote:
> From: Alejandro Lucero <[email protected]>
> 
> 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 cxl_region_probe() calls
> register_mt_adistance_algorithm() what can happen when CXL regions
> are dynamically created at any time from Type3 device(s) or when a Type2
> device is initialized at its driver probe.
> 
> Fixes: 3718c02dbd4c ("acpi, hmat: calculate abstract distance with HMAT")
> 
> Signed-off-by: Alejandro Lucero <[email protected]>

Reviewed-by: Dave Jiang <[email protected]>


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