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ACPI: call init_acpi_device_notify() explicitly rather than as initcall

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This patch makes acpi_init() call init_acpi_device_notify() directly.
Previously, init_acpi_device_notify() was an arch_initcall (sequence 3),
so it was called before acpi_init() (a subsys_initcall at sequence 4).

init_acpi_device_notify() sets the platform_notify and
platform_notify_remove function pointers.  These pointers
are not used until acpi_init() enumerates ACPI devices in
this path:

    acpi_init()
	    acpi_scan_init()
		acpi_bus_scan()
		    acpi_add_single_object()
			acpi_device_register()
			    device_add()
				<use platform_notify>

So it is sufficient to have acpi_init() call init_acpi_device_notify()
directly before it enumerates devices.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bjorn Helgaas 2009-03-24 16:50:09 -06:00 committed by Len Brown
parent 84f810c33f
commit 0e46517d96
3 changed files with 3 additions and 5 deletions
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1
drivers/acpi/bus.c
View file

@ -855,6 +855,7 @@ static int __init acpi_init(void)
acpi_kobj = NULL;
}
init_acpi_device_notify();
result = acpi_bus_init();
if (!result) {

6
drivers/acpi/glue.c
View file

@ -286,10 +286,8 @@ static int acpi_platform_notify_remove(struct device *dev)
return 0;
}
static int __init init_acpi_device_notify(void)
int __init init_acpi_device_notify(void)
{
if (acpi_disabled)
return 0;
if (platform_notify || platform_notify_remove) {
printk(KERN_ERR PREFIX "Can't use platform_notify\n");
return 0;
@ -298,5 +296,3 @@ static int __init init_acpi_device_notify(void)
platform_notify_remove = acpi_platform_notify_remove;
return 0;
}
arch_initcall(init_acpi_device_notify);

1
drivers/acpi/internal.h
View file

@ -1,5 +1,6 @@
/* For use by Linux/ACPI infrastructure, not drivers */
int init_acpi_device_notify(void);
int acpi_scan_init(void);
int acpi_system_init(void);