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-rw-r--r--drivers/acpi/acpica/Makefile2
-rw-r--r--include/acpi/platform/aclinux.h10
2 files changed, 11 insertions, 1 deletions
diff --git a/drivers/acpi/acpica/Makefile b/drivers/acpi/acpica/Makefile
index 8bb43f06e11f..87a24ac21363 100644
--- a/drivers/acpi/acpica/Makefile
+++ b/drivers/acpi/acpica/Makefile
@@ -2,7 +2,7 @@
# Makefile for ACPICA Core interpreter
#
-ccflags-y := -Os
+ccflags-y := -Os -DBUILDING_ACPICA
ccflags-$(CONFIG_ACPI_DEBUG) += -DACPI_DEBUG_OUTPUT
# use acpi.o to put all files here into acpi.o modparam namespace
diff --git a/include/acpi/platform/aclinux.h b/include/acpi/platform/aclinux.h
index dfba35476b8a..1ba7c190c2cc 100644
--- a/include/acpi/platform/aclinux.h
+++ b/include/acpi/platform/aclinux.h
@@ -44,6 +44,16 @@
#ifndef __ACLINUX_H__
#define __ACLINUX_H__
+#ifdef __KERNEL__
+
+/* ACPICA external files should not include ACPICA headers directly. */
+
+#if !defined(BUILDING_ACPICA) && !defined(_LINUX_ACPI_H)
+#error "Please don't include <acpi/acpi.h> directly, include <linux/acpi.h> instead."
+#endif
+
+#endif
+
/* Common (in-kernel/user-space) ACPICA configuration */
#define ACPI_USE_SYSTEM_CLIBRARY