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Subject[RFC PATCH] ACPI: Fix build errors due objects compiled unconditionally
Date
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 <javier@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


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