linux-kernel - Re: [RFC PATCH v5 4/8] ACPI, PCI: avoid building pci

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Message-ID: <3500982.MUDp6kKU3R@vostro.rjw.lan>
Date:	Mon, 21 Jan 2013 01:01:58 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Jiang Liu <liuj97@...il.com>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Jiang Liu <jiang.liu@...wei.com>,
	Yinghai Lu <yinghai@...nel.org>,
	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
	Yijing Wang <wangyijing@...wei.com>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Toshi Kani <toshi.kani@...com>,
	Myron Stowe <myron.stowe@...hat.com>
Subject: Re: [RFC PATCH v5 4/8] ACPI, PCI: avoid building pci_slot as module

On Saturday, January 19, 2013 12:07:42 AM Jiang Liu wrote:
> As discussed in thread at https://patchwork.kernel.org/patch/1946851/,
> there's no value in supporting CONFIG_ACPI_PCI_SLOT=m any more.
> So change Kconfig and code to only support building pci_slot as
> built-in driver.
> 
> Signed-off-by: Jiang Liu <jiang.liu@...wei.com>

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

> ---
>  drivers/acpi/Kconfig    |    5 +----
>  drivers/acpi/internal.h |    5 +++++
>  drivers/acpi/pci_slot.c |   13 +------------
>  drivers/acpi/scan.c     |    1 +
>  4 files changed, 8 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
> index 0300bf6..7efd0d0 100644
> --- a/drivers/acpi/Kconfig
> +++ b/drivers/acpi/Kconfig
> @@ -299,7 +299,7 @@ config ACPI_DEBUG_FUNC_TRACE
>  	  is about half of the penalty and is rarely useful.
>  
>  config ACPI_PCI_SLOT
> -	tristate "PCI slot detection driver"
> +	bool "PCI slot detection driver"
>  	depends on SYSFS
>  	default n
>  	help
> @@ -308,9 +308,6 @@ config ACPI_PCI_SLOT
>  	  i.e., segment/bus/device/function tuples, with physical slots in
>  	  the system.  If you are unsure, say N.
>  
> -	  To compile this driver as a module, choose M here:
> -	  the module will be called pci_slot.
> -
>  config X86_PM_TIMER
>  	bool "Power Management Timer Support" if EXPERT
>  	depends on X86
> diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
> index e050254..7374cfc 100644
> --- a/drivers/acpi/internal.h
> +++ b/drivers/acpi/internal.h
> @@ -67,6 +67,11 @@ struct acpi_ec {
>  
>  extern struct acpi_ec *first_ec;
>  
> +#ifdef	CONFIG_ACPI_PCI_SLOT
> +void acpi_pci_slot_init(void);
> +#else
> +static inline void acpi_pci_slot_init(void) { }
> +#endif
>  int acpi_pci_root_init(void);
>  int acpi_ec_init(void);
>  int acpi_ec_ecdt_probe(void);
> diff --git a/drivers/acpi/pci_slot.c b/drivers/acpi/pci_slot.c
> index d22585f..a7d7e77 100644
> --- a/drivers/acpi/pci_slot.c
> +++ b/drivers/acpi/pci_slot.c
> @@ -330,19 +330,8 @@ static struct dmi_system_id acpi_pci_slot_dmi_table[] __initdata = {
>  	{}
>  };
>  
> -static int __init
> -acpi_pci_slot_init(void)
> +void __init acpi_pci_slot_init(void)
>  {
>  	dmi_check_system(acpi_pci_slot_dmi_table);
>  	acpi_pci_register_driver(&acpi_pci_slot_driver);
> -	return 0;
>  }
> -
> -static void __exit
> -acpi_pci_slot_exit(void)
> -{
> -	acpi_pci_unregister_driver(&acpi_pci_slot_driver);
> -}
> -
> -module_init(acpi_pci_slot_init);
> -module_exit(acpi_pci_slot_exit);
> diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
> index f8a0d0f..cb964ac 100644
> --- a/drivers/acpi/scan.c
> +++ b/drivers/acpi/scan.c
> @@ -1732,6 +1732,7 @@ int __init acpi_scan_init(void)
>  
>  	acpi_power_init();
>  	acpi_pci_root_init();
> +	acpi_pci_slot_init();
>  
>  	/*
>  	 * Enumerate devices in the ACPI namespace.
> 
-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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