On Tuesday, March 17, 2015 10:36:47 AM Hanjun Guo wrote:
On 2015/3/17 10:28, Rafael J. Wysocki wrote:
On Tuesday, March 17, 2015 09:08:45 AM Hanjun Guo wrote:
On 2015/3/17 7:15, Rafael J. Wysocki wrote:
On Monday, March 16, 2015 08:14:52 PM Hanjun Guo wrote:
On 2015年03月14日 05:49, Rafael J. Wysocki wrote:
On Friday, March 13, 2015 04:14:29 PM Hanjun Guo wrote:
[...]
> diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig > index 074e52b..e8728d7 100644 > --- a/arch/ia64/Kconfig > +++ b/arch/ia64/Kconfig > @@ -10,6 +10,7 @@ config IA64 > select ARCH_MIGHT_HAVE_PC_SERIO > select PCI if (!IA64_HP_SIM) > select ACPI if (!IA64_HP_SIM) > + select ACPI_GENERIC_SLEEP if ACPI > select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI > select HAVE_UNSTABLE_SCHED_CLOCK > select HAVE_IDE > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index b7d31ca..9804431 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -22,6 +22,7 @@ config X86_64 > ### Arch settings > config X86 > def_bool y > + select ACPI_GENERIC_SLEEP if ACPI One more nit. If you did
- select ACPI_GENERIC_SLEEP if ACPI_SLEEP
here (and above for ia64), you'd avoid having to make ACPI_SLEEP depend on ACPI_GENERIC_SLEEP which goes somewhat backwards.
In sleep.c,
#ifdef CONFIG_ACPI_SLEEP acpi_target_system_state() { } #endif
and CONFIG_ACPI_SLEEP depends on SUSPEND || HIBERNATION, which one of them will be enabled on ARM64 so ACPI_SLEEP will also enabled too.
So if we
+select ACPI_GENERIC_SLEEP if ACPI_SLEEP
and
+acpi-$(CONFIG_ACPI_GENERIC_SLEEP) += sleep.o
it will lead to errors for acpi_target_system_state() that is declared but not defined, so I will keep the code as it is, what do you think?
No, we need to hash this out. Having two different Kconfig options meaning almost the same thing (ACPI_SLEEP and ACPI_GENERIC_SLEEP) is beyond ugly.
Do you need ACPI_SLEEP on ARM64 at all?
No, at least for now we don't need it, the spec for sleep is not ready for ARM64 arch, so ACPI_SLEEP will not work at all on ARM64.
Well, so what about selecting ACPI_SLEEP from the architectures that use it?
Do you mean remove CONFIG_ACPI_GENERIC_SLEEP and
+acpi-$(CONFIG_ACPI_SLEEP) += sleep.o
as well (also need to remove duplicate #ifdef CONFIG_ACPI_SLEEP in sleep.c if we doing so)?
Well, almost. There is one problem with that, becuase sleep.c contains code outside of the ACPI_SLEEP-dependent blocks. That code is used for powering off ACPI platforms.
I guess you don't want that code on ARM too, right?
Perhaps we can use ACPI_REDUCED_HARDWARE_ONLY for that? ARM64 will be the only arch setting it at least for the time being, is that correct?