diff mbox

[RFC,05/16] arm64: support poweroff through poweroff handler call chain

Message ID 1412100056-15517-6-git-send-email-linux@roeck-us.net (mailing list archive)
State RFC, archived
Headers show

Commit Message

Guenter Roeck Sept. 30, 2014, 6 p.m. UTC
The kernel core now supports a poweroff handler call chain
to remove power from the system. Call it if pm_power_off
is set to NULL.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 arch/arm64/kernel/process.c | 2 ++
 1 file changed, 2 insertions(+)

Comments

Catalin Marinas Oct. 3, 2014, 10:30 a.m. UTC | #1
On Tue, Sep 30, 2014 at 07:00:45PM +0100, Guenter Roeck wrote:
> The kernel core now supports a poweroff handler call chain
> to remove power from the system. Call it if pm_power_off
> is set to NULL.
> 
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Will Deacon <will.deacon@arm.com>
> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
> ---
>  arch/arm64/kernel/process.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
> index 398ab05..cc0c63e 100644
> --- a/arch/arm64/kernel/process.c
> +++ b/arch/arm64/kernel/process.c
> @@ -157,6 +157,8 @@ void machine_power_off(void)
>  	smp_send_stop();
>  	if (pm_power_off)
>  		pm_power_off();
> +	else
> +		do_kernel_poweroff();

Acked-by: Catalin Marinas <catalin.marinas@arm.com>

As others already stated, I think we should eventually remove
pm_power_off entirely.

Catalin
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Guenter Roeck Oct. 3, 2014, 1:12 p.m. UTC | #2
On 10/03/2014 03:30 AM, Catalin Marinas wrote:
> On Tue, Sep 30, 2014 at 07:00:45PM +0100, Guenter Roeck wrote:
>> The kernel core now supports a poweroff handler call chain
>> to remove power from the system. Call it if pm_power_off
>> is set to NULL.
>>
>> Cc: Catalin Marinas <catalin.marinas@arm.com>
>> Cc: Will Deacon <will.deacon@arm.com>
>> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
>> ---
>>   arch/arm64/kernel/process.c | 2 ++
>>   1 file changed, 2 insertions(+)
>>
>> diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
>> index 398ab05..cc0c63e 100644
>> --- a/arch/arm64/kernel/process.c
>> +++ b/arch/arm64/kernel/process.c
>> @@ -157,6 +157,8 @@ void machine_power_off(void)
>>   	smp_send_stop();
>>   	if (pm_power_off)
>>   		pm_power_off();
>> +	else
>> +		do_kernel_poweroff();
>
> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
>
> As others already stated, I think we should eventually remove
> pm_power_off entirely.
>

Hi Catalin,
yes, already working on it. As suggested by others, I'll move pm_power_off
to a central location (no need to declare the same variable for each
architecture) and hide the call to it in do_kernel_poweroff() as a
first step. You'll see this in the next version of the series.
This will make it much easier to remove it later on.

Thanks,
Guenter

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diff mbox

Patch

diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index 398ab05..cc0c63e 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -157,6 +157,8 @@  void machine_power_off(void)
 	smp_send_stop();
 	if (pm_power_off)
 		pm_power_off();
+	else
+		do_kernel_poweroff();
 }
 
 /*