ACPI / processor: Introduce ARCH_MIGHT_HAVE_ACPI_PDC

The use of _PDC is deprecated in ACPI 3.0 in favor of _OSC,
as ARM platform is supported only in ACPI 5.0 or higher version,
_PDC will not be used in ARM platform, so make Make _PDC only for
platforms with Intel CPUs.

Introduce ARCH_MIGHT_HAVE_ACPI_PDC and move _PDC related code in
ACPI processor driver into a single file processor_pdc.c, make x86
and ia64 select it when ACPI is enabled.

This patch also use pr_* to replace printk to fix the checkpatch
warning and factor acpi_processor_alloc_pdc() a little bit to
avoid duplicate pr_err() code.

Suggested-by: Robert Richter <rric@kernel.org>
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

2 files changed, 2 insertions, 0 deletions

diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 2f3abcf8f6bc..44a6915ab13d 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 ARCH_MIGHT_HAVE_ACPI_PDC if ACPI
         select PM if (!IA64_HP_SIM)
         select HAVE_UNSTABLE_SCHED_CLOCK
         select HAVE_IDE
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5617750262db..70c43b5371bb 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -21,6 +21,7 @@ config X86_64
 ### Arch settings
 config X86
         def_bool y
+        select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI
         select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
         select ARCH_MIGHT_HAVE_PC_PARPORT
         select ARCH_MIGHT_HAVE_PC_SERIO