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-rw-r--r--drivers/acpi/acpica/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/acpi/acpica/Makefile b/drivers/acpi/acpica/Makefile
index 32d93edbc479..dea65306b687 100644
--- a/drivers/acpi/acpica/Makefile
+++ b/drivers/acpi/acpica/Makefile
@@ -2,7 +2,7 @@
# Makefile for ACPICA Core interpreter
#
-ccflags-y := -Os -DBUILDING_ACPICA
+ccflags-y := -Os -D_LINUX -DBUILDING_ACPICA
ccflags-$(CONFIG_ACPI_DEBUG) += -DACPI_DEBUG_OUTPUT
# use acpi.o to put all files here into acpi.o modparam namespace