If the CONFIG_ACPI Kconfig symbol is not enabled and a partial build is attempted (make M=drivers/acpi), compile errors will happen due missing types and identifiers.
This is because objects are tried to be built unconditionally even when CONFIG_ACPI is not enabled. This is usually not a problem since arches' Kconfig sources drivers/acpi/Kconfig directly and also selects ACPI but the Makefile should conditionally build the objects as well. Signed-off-by: Javier Martinez Canillas <jav...@osg.samsung.com> --- Hello, I found this issue while doing other stuff and since I'm not that familiar with ACPI and was surprised that the obj-y comes from a very old commit, I marked this patch as RFC. $SUBJECT fixes the build issue for me though on ARM32 and I build tested on x86. Build error log: http://hastebin.com/alaneqiper.pl Patch is on top of next-20151012. Best regards, Javier drivers/acpi/Makefile | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index b5e7cd8a9c71..7fa53ddf6794 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -8,13 +8,13 @@ ccflags-$(CONFIG_ACPI_DEBUG) += -DACPI_DEBUG_OUTPUT # # ACPI Boot-Time Table Parsing # -obj-y += tables.o +obj-$(CONFIG_ACPI) += tables.o obj-$(CONFIG_X86) += blacklist.o # # ACPI Core Subsystem (Interpreter) # -obj-y += acpi.o \ +obj-$(CONFIG_ACPI) += acpi.o \ acpica/ # All the builtin files are in the "acpi." module_param namespace. @@ -66,10 +66,10 @@ obj-$(CONFIG_ACPI_FAN) += fan.o obj-$(CONFIG_ACPI_VIDEO) += video.o obj-$(CONFIG_ACPI_PCI_SLOT) += pci_slot.o obj-$(CONFIG_ACPI_PROCESSOR) += processor.o -obj-y += container.o +obj-$(CONFIG_ACPI) += container.o obj-$(CONFIG_ACPI_THERMAL) += thermal.o obj-$(CONFIG_ACPI_NFIT) += nfit.o -obj-y += acpi_memhotplug.o +obj-$(CONFIG_ACPI) += acpi_memhotplug.o obj-$(CONFIG_ACPI_HOTPLUG_IOAPIC) += ioapic.o obj-$(CONFIG_ACPI_BATTERY) += battery.o obj-$(CONFIG_ACPI_SBS) += sbshc.o -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
