Re: [PATCH v7 11/12] acpi/numa/hmat: Register HMAT at device_initcall level

Rafael J. Wysocki
2019-10-17T21:51:37Z

On Wed, Oct 16, 2019 at 3:14 AM Dan Williams <dan.j.williams@intel.com> wrote:
>
> In preparation for registering device-dax instances for accessing EFI
> specific-purpose memory, arrange for the HMAT registration to occur
> later in the init process. Critically HMAT initialization needs to occur
> after e820__reserve_resources_late() which is the point at which the
> iomem resource tree is populated with "Application Reserved"
> (IORES_DESC_APPLICATION_RESERVED). e820__reserve_resources_late()
> happens at subsys_initcall time.
>
> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
> Cc: Len Brown <lenb@kernel.org>
> Cc: Keith Busch <kbusch@kernel.org>
> Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
> Signed-off-by: Dan Williams <dan.j.williams@intel.com>

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.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 8f9a28a870b0..4707eb9dd07b 100644
> --- a/drivers/acpi/numa/hmat.c
> +++ b/drivers/acpi/numa/hmat.c
> @@ -748,4 +748,4 @@ static __init int hmat_init(void)
> acpi_put_table(tbl);
> return 0;
> }
> -subsys_initcall(hmat_init);
> +device_initcall(hmat_init);
>