On Tuesday, March 17, 2015 12:10:02 PM Hanjun Guo wrote:
On 2015/3/17 11:23, Rafael J. Wysocki wrote:
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?
Yes, you are right.
Perhaps we can use ACPI_REDUCED_HARDWARE_ONLY for that? ARM64 will be the
Sorry, I can't fully understand your intention here, could you please explain it more?
Let me guess a little bit. Do you mean use ACPI_REDUCED_HARDWARE_ONLY for powering off ACPI platforms? if so, I guess it's not a good idea, ACPI spec only says that S4BIOS is not supported on HW-reduced ACPI platforms, S5 has no such limitation, if I miss something here, please let me know.
OK, so in your current patch, please replace ACPI_GENERIC_SLEEP with ACPI_SYSTEM_POWER_STATES_SUPPORT and all should be clear.