Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754912AbbFKTpa (ORCPT ); Thu, 11 Jun 2015 15:45:30 -0400 Received: from mail-ig0-f174.google.com ([209.85.213.174]:35441 "EHLO mail-ig0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753129AbbFKTp1 (ORCPT ); Thu, 11 Jun 2015 15:45:27 -0400 From: al.stone@linaro.org To: linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: linaro-acpi@lists.linaro.org, patches@linaro.org, linaro-kernel@lists.linaro.org Subject: [PATCH 1/3] ACPI: introduce macros for using the ACPI specification version Date: Thu, 11 Jun 2015 13:45:09 -0600 Message-Id: <1434051911-14665-2-git-send-email-al.stone@linaro.org> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1434051911-14665-1-git-send-email-al.stone@linaro.org> References: <1434051911-14665-1-git-send-email-al.stone@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1707 Lines: 49 From: Al Stone 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 Reviewed-by: Hanjun Guo Reviewed-by: Graeme Gregory CC: Rafael J. Wysocki CC: Len Brown --- 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 #include +#define ACPI_SPEC_VERSION(major, minor) ((major<<8)|minor) +#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; -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/