[PATCH v2 5/5] ACPI: arm64: use "Linux" as ACPI_OS_NAME for _OS on arm64

From: al . stone
Date: Tue Feb 03 2015 - 19:22:34 EST


From: Al Stone <al.stone@xxxxxxxxxx>

ACPI_OS_NAME is globally defined as "Microsoft Windows NT" for now.
That doesn't make much sense in the ARM context, so set it to "Linux"
when CONFIG_ARM64.

If it is necessary to change the return value from \_OS_ (that is, return
some value other than the default in ACPI_OS_NAME), use the kernel parameter
"acpi_os_name=<string>".

Many thanks to Rafael Wysocki for this greatly simplified form of the patch.

Signed-off-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
Signed-off-by: Al Stone <al.stone@xxxxxxxxxx>
---
arch/arm64/Kconfig | 5 +++++
include/acpi/acconfig.h | 2 ++
include/acpi/platform/aclinux.h | 4 ++++
3 files changed, 11 insertions(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index d01d3f7..9a13d28 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -88,6 +88,11 @@ config ARM64
config 64BIT
def_bool y

+config ACPI_OS_NAME
+ string
+ default "Linux"
+ depends on ACPI
+
config ARCH_PHYS_ADDR_T_64BIT
def_bool y

diff --git a/include/acpi/acconfig.h b/include/acpi/acconfig.h
index 5a0a3e5..1980bf4 100644
--- a/include/acpi/acconfig.h
+++ b/include/acpi/acconfig.h
@@ -69,7 +69,9 @@
* code that will not execute the _OSI method unless _OS matches the string
* below. Therefore, change this string at your own risk.
*/
+#ifndef ACPI_OS_NAME
#define ACPI_OS_NAME "Microsoft Windows NT"
+#endif

/* Maximum objects in the various object caches */

diff --git a/include/acpi/platform/aclinux.h b/include/acpi/platform/aclinux.h
index 1ba7c19..a871cdd 100644
--- a/include/acpi/platform/aclinux.h
+++ b/include/acpi/platform/aclinux.h
@@ -69,6 +69,10 @@
#define ACPI_REDUCED_HARDWARE 1
#endif

+#ifdef CONFIG_ACPI_OS_NAME
+#define ACPI_OS_NAME CONFIG_ACPI_OS_NAME
+#endif
+
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/ctype.h>
--
2.1.0

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