From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B3A67C433DF for ; Thu, 6 Aug 2020 19:42:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B954D2177B for ; Thu, 6 Aug 2020 19:42:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="vQ9MkvPx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726150AbgHFTmR (ORCPT ); Thu, 6 Aug 2020 15:42:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41772 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725272AbgHFTmQ (ORCPT ); Thu, 6 Aug 2020 15:42:16 -0400 Received: from mail-ej1-x642.google.com (mail-ej1-x642.google.com [IPv6:2a00:1450:4864:20::642]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6DCDEC061574 for ; Thu, 6 Aug 2020 12:42:16 -0700 (PDT) Received: by mail-ej1-x642.google.com with SMTP id m22so8488607eje.10 for ; Thu, 06 Aug 2020 12:42:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=lTGXraRKF2Xnn2zuWAFO6+p95IAHDQSM01rMKogsvzs=; b=vQ9MkvPxcyEeIPqReTCgblByWgNh2RXqMOXfyQnzzV5pGUlbO1gNEi9Tuk2yXGAyvw Llp+YllnNF+/5YT35hIhLddUTJeCADRxco3W0o3sJc6USpPGiFgOPIyrTihBZOF3Ps3m b5ZWbutt/sHTifnimmHoLPTtNqysTQ9XTb7MzUOjCMNhbiT5DOvjHviINbVtIZmIxAqP S/sojwgCS0IH2KnB0TgYVG74FK3c4xzz0rriqrJAqHzc4Qk0guo0NNaJc+a+XXnz9Sog 4j/RZfiLZqNe763mb3UC297NbxucK6AXP/cO9wRfGDEb577fsZw7XZ8d8qKe5ewyzyAP 3TSA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=lTGXraRKF2Xnn2zuWAFO6+p95IAHDQSM01rMKogsvzs=; b=ARd6hJv+NXd5s/qk26WZ7kkcWSBTjLPdixyWyCeT14ytPbU9mAQ+bAhoOHD49OGyY7 UTZccqO5mrhUazNsUP16X7B22Q+c+7bZqRwAjJA3eDPRJw2cP8dVoSR3Is5MqzS/TzLr DzjB0eg7eaodVtE2ee8SXwlDuOhycMAwg3gVuDDyBHRy+xaKQqUcdXrOadSaZSYu5Ny6 3OXGv37E5GzrGflngMPnzTHSgT/iYGtFOpt/O5yL5vQhYjgHJhkA4G6ZSdLaOwdIeO1t fBQFKDWj3LztxGmpj3+sFfEa1J0m+ymCCvcQbHmuBg3hMRfblJFFtoGKnVjuRBh5VKWR 9pGQ== X-Gm-Message-State: AOAM530enUZJDyDc2oRKIEZC5zk15BFZZcxeUu1RMgiLIA2zs6VHnaRy KHdz0BuJ5ZIM467NwEwHw/o= X-Google-Smtp-Source: ABdhPJwUSrOkit6R1m2RY1wbmUSTm5YwAHlyOTZHCmOcOrZQfPZ3BWq1IWCOT8TWScXfg7dJa2YeoA== X-Received: by 2002:a17:906:2451:: with SMTP id a17mr5773388ejb.274.1596742935020; Thu, 06 Aug 2020 12:42:15 -0700 (PDT) Received: from localhost.localdomain ([2a02:a03f:a7fb:e200:d567:ec52:e0a5:f485]) by smtp.gmail.com with ESMTPSA id e13sm4016643eds.46.2020.08.06.12.42.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Aug 2020 12:42:14 -0700 (PDT) From: Luc Van Oostenryck To: Andrew Morton Cc: linux-kernel@vger.kernel.org, Luc Van Oostenryck Subject: [RESEND PATCH] sparse: use static inline for __chk_{user,io}_ptr() Date: Thu, 6 Aug 2020 21:42:06 +0200 Message-Id: <20200806194206.10338-1-luc.vanoostenryck@gmail.com> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org __chk_user_ptr() & __chk_io_ptr() are dummy extern functions which only exist to enforce the typechecking of __user or __iomem pointers in macros when using sparse. This typechecking is done by inserting a call to these functions. But the presence of these calls can inhibit some simplifications and so influence the result of sparse's analysis of context/locking. Fix this by changing these calls into static inline calls with an empty body. Signed-off-by: Luc Van Oostenryck --- include/linux/compiler_types.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h index b67930216e45..a9b6699f3934 100644 --- a/include/linux/compiler_types.h +++ b/include/linux/compiler_types.h @@ -11,8 +11,8 @@ # define __iomem __attribute__((noderef, address_space(__iomem))) # define __percpu __attribute__((noderef, address_space(__percpu))) # define __rcu __attribute__((noderef, address_space(__rcu))) -extern void __chk_user_ptr(const volatile void __user *); -extern void __chk_io_ptr(const volatile void __iomem *); +static inline void __chk_user_ptr(const volatile void __user *ptr) { } +static inline void __chk_io_ptr(const volatile void __iomem *ptr) { } /* context/locking */ # define __must_hold(x) __attribute__((context(x,1,1))) # define __acquires(x) __attribute__((context(x,0,1))) -- 2.28.0