[PATCH v2 1/3] ACPI : introduce macros for using the ACPI specification version
From: Hanjun Guo <hidden>
Date: 2015-06-19 10:49:32
Also in:
linux-acpi, lkml
On 06/19/2015 06:36 AM, Al Stone wrote:
quoted hunk ↗ jump to hunk
Add the ACPI_SPEC_VERSION() macro to build a proper version number from a major and minor revision number. Add also the ACPI_FADT_SPEC_VERSION that constructs a proper version number from the entries in the current FADT. These macros are added in order to simplify retrieving and comparing ACPI specification version numbers, since this is becoming a more frequent need. In particular, there are some architectures that require at least a certain version of the spec, and there are differences in some structure sizes that have changed with recent versions but can only be tracked by spec version number. Signed-off-by: Al Stone <redacted> --- include/linux/acpi.h | 5 +++++ 1 file changed, 5 insertions(+)diff --git a/include/linux/acpi.h b/include/linux/acpi.h index a4acb55..33ed313 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h@@ -48,6 +48,11 @@ #include <acpi/acpi_io.h> #include <asm/acpi.h> +#define ACPI_SPEC_VERSION(major, minor) ((major<<8)|minor)
and minor comments for code style ((major<<8)|minor) - > ((major << 8) | minor) other than that: Reviewed-by: Hanjun Guo <redacted> Thanks Hanjun
+#define ACPI_FADT_SPEC_VERSION \
+ ACPI_SPEC_VERSION(acpi_gbl_FADT.header.revision, \
+ acpi_gbl_FADT.minor_revision)
+
static inline acpi_handle acpi_device_handle(struct acpi_device *adev)
{
return adev ? adev->handle : NULL;