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Date: Fri, 16 Dec 2011 16:33:45 -0500
From: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To: ke.yu@...el.com, kevin.tian@...el.com,
linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
lenb@...nel.org, rjw@...k.pl
Cc: xen-devel@...ts.xensource.com, jeremy@...p.org, konrad@...nel.org,
stefan.bader@...onical.com, Ian.Campbell@...rix.com,
mike.mcclurg@...rix.com, liang.tang@...cle.com
Subject: Re: [PATCH 1/8] ACPI: processor: export necessary interfaces
On Wed, Nov 30, 2011 at 12:20:57PM -0500, Konrad Rzeszutek Wilk wrote:
> From: Kevin Tian <kevin.tian@...el.com>
>
> This patch export some necessary functions which parse processor
> power management information. The Xen ACPI processor driver uses them.
I was wondering if it could be done by moving a bunch of these
functions in the processor_perflib.c, but there is a lot of code
that would have to be moved. Way too much.
Perhaps another, and a nicer way would be to:
1). Create a processor_driver_lib.c which would have the "generic" code
2). In the processor_driver just keep the essential notifications, and
the hotplug code
3). The introduce the other user of the acpi_processor_[add|remove|notify]
calls as a seperate library?
Thoughts?
>
> Signed-off-by: Yu Ke <ke.yu@...el.com>
> Signed-off-by: Tian Kevin <kevin.tian@...el.com>
> Signed-off-by: Tang Liang <liang.tang@...cle.com>
> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> ---
> drivers/acpi/processor_driver.c | 11 +++--------
> drivers/acpi/processor_perflib.c | 4 ++--
> include/acpi/processor.h | 10 +++++++++-
> 3 files changed, 14 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c
> index 9d7bc9f..211c078 100644
> --- a/drivers/acpi/processor_driver.c
> +++ b/drivers/acpi/processor_driver.c
> @@ -79,9 +79,6 @@ MODULE_AUTHOR("Paul Diefenbaugh");
> MODULE_DESCRIPTION("ACPI Processor Driver");
> MODULE_LICENSE("GPL");
>
> -static int acpi_processor_add(struct acpi_device *device);
> -static int acpi_processor_remove(struct acpi_device *device, int type);
> -static void acpi_processor_notify(struct acpi_device *device, u32 event);
> static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu);
> static int acpi_processor_handle_eject(struct acpi_processor *pr);
>
> @@ -378,7 +375,7 @@ static int acpi_processor_get_info(struct acpi_device *device)
>
> static DEFINE_PER_CPU(void *, processor_device_array);
>
> -static void acpi_processor_notify(struct acpi_device *device, u32 event)
> +void acpi_processor_notify(struct acpi_device *device, u32 event)
> {
> struct acpi_processor *pr = acpi_driver_data(device);
> int saved;
> @@ -442,7 +439,7 @@ static struct notifier_block acpi_cpu_notifier =
> .notifier_call = acpi_cpu_soft_notify,
> };
>
> -static int __cpuinit acpi_processor_add(struct acpi_device *device)
> +int __cpuinit acpi_processor_add(struct acpi_device *device)
> {
> struct acpi_processor *pr = NULL;
> int result = 0;
> @@ -545,7 +542,7 @@ err_free_cpumask:
> return result;
> }
>
> -static int acpi_processor_remove(struct acpi_device *device, int type)
> +int acpi_processor_remove(struct acpi_device *device, int type)
> {
> struct acpi_processor *pr = NULL;
>
> @@ -758,7 +755,6 @@ static int acpi_processor_handle_eject(struct acpi_processor *pr)
> }
> #endif
>
> -static
> void acpi_processor_install_hotplug_notify(void)
> {
> #ifdef CONFIG_ACPI_HOTPLUG_CPU
> @@ -771,7 +767,6 @@ void acpi_processor_install_hotplug_notify(void)
> register_hotcpu_notifier(&acpi_cpu_notifier);
> }
>
> -static
> void acpi_processor_uninstall_hotplug_notify(void)
> {
> #ifdef CONFIG_ACPI_HOTPLUG_CPU
> diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
> index 85b3237..22c6195 100644
> --- a/drivers/acpi/processor_perflib.c
> +++ b/drivers/acpi/processor_perflib.c
> @@ -386,7 +386,7 @@ static int acpi_processor_get_performance_states(struct acpi_processor *pr)
> return result;
> }
>
> -static int acpi_processor_get_performance_info(struct acpi_processor *pr)
> +int acpi_processor_get_performance_info(struct acpi_processor *pr)
> {
> int result = 0;
> acpi_status status = AE_OK;
> @@ -492,7 +492,7 @@ int acpi_processor_notify_smm(struct module *calling_module)
>
> EXPORT_SYMBOL(acpi_processor_notify_smm);
>
> -static int acpi_processor_get_psd(struct acpi_processor *pr)
> +int acpi_processor_get_psd(struct acpi_processor *pr)
> {
> int result = 0;
> acpi_status status = AE_OK;
> diff --git a/include/acpi/processor.h b/include/acpi/processor.h
> index 610f6fb..12657bb 100644
> --- a/include/acpi/processor.h
> +++ b/include/acpi/processor.h
> @@ -239,6 +239,12 @@ extern void acpi_processor_unregister_performance(struct
> if a _PPC object exists, rmmod is disallowed then */
> int acpi_processor_notify_smm(struct module *calling_module);
>
> +void acpi_processor_install_hotplug_notify(void);
> +void acpi_processor_uninstall_hotplug_notify(void);
> +
> +int acpi_processor_add(struct acpi_device *device);
> +int acpi_processor_remove(struct acpi_device *device, int type);
> +void acpi_processor_notify(struct acpi_device *device, u32 event);
> /* for communication between multiple parts of the processor kernel module */
> DECLARE_PER_CPU(struct acpi_processor *, processors);
> extern struct acpi_processor_errata errata;
> @@ -278,7 +284,9 @@ static inline void acpi_processor_ffh_cstate_enter(struct acpi_processor_cx
> void acpi_processor_ppc_init(void);
> void acpi_processor_ppc_exit(void);
> int acpi_processor_ppc_has_changed(struct acpi_processor *pr, int event_flag);
> -extern int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
> +int acpi_processor_get_performance_info(struct acpi_processor *pr);
> +int acpi_processor_get_psd(struct acpi_processor *pr);
> +int acpi_processor_get_bios_limit(int cpu, unsigned int *limit);
> #else
> static inline void acpi_processor_ppc_init(void)
> {
> --
> 1.7.7.3
--
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