linux-kernel - Re: [PATCH v4 09/10] acpi/numa/hmat: Register HMAT at device

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Date:   Wed, 3 Jul 2019 13:12:36 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     "the arch/x86 maintainers" <x86@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        Keith Busch <keith.busch@...el.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        "linux-nvdimm@...ts.01.org" <linux-nvdimm@...ts.01.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 09/10] acpi/numa/hmat: Register HMAT at device_initcall level

On Mon, Jun 24, 2019 at 8:34 PM Dan Williams <dan.j.williams@...el.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@...ysocki.net>
> Cc: Len Brown <lenb@...nel.org>
> Cc: Keith Busch <keith.busch@...el.com>
> Cc: Jonathan Cameron <Jonathan.Cameron@...wei.com>
> Reviewed-by: Dave Hansen <dave.hansen@...ux.intel.com>
> Signed-off-by: Dan Williams <dan.j.williams@...el.com>

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.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 2c220cb7b620..1d329c4af3bf 100644
> --- a/drivers/acpi/numa/hmat.c
> +++ b/drivers/acpi/numa/hmat.c
> @@ -671,4 +671,4 @@ static __init int hmat_init(void)
>         acpi_put_table(tbl);
>         return 0;
>  }
> -subsys_initcall(hmat_init);
> +device_initcall(hmat_init);
>