From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753608AbdJPRaw (ORCPT ); Mon, 16 Oct 2017 13:30:52 -0400 Received: from esa3.hgst.iphmx.com ([216.71.153.141]:22288 "EHLO esa3.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751358AbdJPRav (ORCPT ); Mon, 16 Oct 2017 13:30:51 -0400 X-IronPort-AV: E=Sophos;i="5.43,387,1503331200"; d="scan'208";a="58441553" From: Bart Van Assche To: Linus Torvalds Cc: Bart Van Assche , linux-scsi@vger.kernel.org, linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, "Michael S . Tsirkin" , Christoph Hellwig , Leon Romanovsky , Andrew Morton Subject: [PATCH v2] linux/types.h: Restore the ability to disable sparse endianness checks Date: Mon, 16 Oct 2017 10:26:33 -0700 Message-Id: <20171016172633.29290-1-bart.vanassche@wdc.com> X-Mailer: git-send-email 2.14.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The purpose of patch "linux/types.h: enable endian checks for all sparse builds" was to encourage driver authors to annotate endianness correctly in their drivers. However, since that patch went upstream no endianness annotations in drivers have been fixed. I think that this shows that the followed approach does not work, probably because several driver authors do not use sparse. For developers who are not the authors of these drivers it would take a very significant effort to make these drivers endianness clean. Examples are drivers/scsi/qla2xxx and drivers/infiniband/hw/nes. Hence restore the ability to disable sparse endianness checks such that it becomes again easy to review other sparse diagnostics for people who want to analyze drivers they are not the author of. References: commit 05de97003c77 ("linux/types.h: enable endian checks for all sparse builds") Signed-off-by: Bart Van Assche Cc: linux-scsi@vger.kernel.org Cc: linux-rdma@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Michael S. Tsirkin Cc: Christoph Hellwig Cc: Leon Romanovsky Cc: Andrew Morton --- [v2]: Elaborated patch description include/uapi/linux/types.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/uapi/linux/types.h b/include/uapi/linux/types.h index 41e5914f0a8e..d3dcb0764c45 100644 --- a/include/uapi/linux/types.h +++ b/include/uapi/linux/types.h @@ -23,7 +23,11 @@ #else #define __bitwise__ #endif +#if !defined(__CHECK_ENDIAN__) || __CHECK_ENDIAN__ != 0 #define __bitwise __bitwise__ +#else +#define __bitwise +#endif typedef __u16 __bitwise __le16; typedef __u16 __bitwise __be16; -- 2.14.2