GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-22 22:51:37 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

PM: Introduce pm_power_off_prepare

Browse source 
Introduce the pm_power_off_prepare() callback that can be registered by the
interested platforms in analogy with pm_idle() and pm_power_off(), used for
preparing the system to power off (needed by ACPI).

This allows us to drop acpi_sysclass and device_acpi that are only defined in
order to register the ACPI power off preparation callback, which is needed by
pm_power_off() registered in a much different way.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Rafael J. Wysocki 2007-07-19 01:47:40 -07:00 • committed by Linus Torvalds
parent d7372cdf69
commit bd804eba1c
3 changed files with 19 additions and 29 deletions
Download patch file Download diff file Expand all files Collapse all files

9
kernel/sys.c
View file

@ -99,6 +99,13 @@ int C_A_D = 1;
struct pid *cad_pid;
EXPORT_SYMBOL(cad_pid);
/*
* If set, this is used for preparing the system to power off.
*/
void (*pm_power_off_prepare)(void);
EXPORT_SYMBOL(pm_power_off_prepare);
/*
* Notifier list for kernel code which wants to be called
* at shutdown. This is used to stop any idling DMA operations
@ -867,6 +874,8 @@ EXPORT_SYMBOL_GPL(kernel_halt);
void kernel_power_off(void)
{
kernel_shutdown_prepare(SYSTEM_POWER_OFF);
if (pm_power_off_prepare)
pm_power_off_prepare();
printk(KERN_EMERG "Power down.\n");
machine_power_off();
}