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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3CFB7E9B37D for ; Mon, 2 Mar 2026 13:28:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To: Cc:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=7cjIEqDAe6MTPa2yql8v8L5e7mjA+roV54bcD0Te3Y4=; b=3DNvZcJQ8iuYw/XXOlxrOQ/RB2 6JRv6p5v/UeIg7+bOFrH0MGv2TtUZUQS0s2PBw8WR34Xj4lGpUILiqO4wO+09LGXj4T+4CIOuIbq0 W+SHR97dHcrwiX920AChzA5O2Wm4EIkw3m+hMCia7JTmFs6XXPw9BzBJ8hsW+olQeYgK3dU14kaex UPnTKvgXJKk7KsHcWLRI5yW8xEZGwVW5xcZpFoUBAl6ePj69LSVaxR+FU8c5YQxlvwGa0Qm/yiDKf +qz11r7TsCR84xHvRTCscyILeZjHS3tpw2o2o64Rlm4cywZr2v6cI8xdNm0t6CwvayZLKAE/8m+Kn oT7OdAYQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vx3KD-0000000D6b4-1gup; Mon, 02 Mar 2026 13:28:41 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vx3KB-0000000D6Xt-2i38 for linux-arm-kernel@bombadil.infradead.org; Mon, 02 Mar 2026 13:28:39 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:MIME-Version :References:In-Reply-To:Message-Id:Date:Subject:To:From:Sender:Reply-To:Cc: Content-Type:Content-ID:Content-Description; bh=7cjIEqDAe6MTPa2yql8v8L5e7mjA+roV54bcD0Te3Y4=; b=HFTnmAXHPyWiLL3r7ayuNb3glQ dp0+7C4IyN4B/jcppBH4TWhutwyTDfTFtjsqlBKEdM9tluFjEQKHNp0qPOkbaug1R0PI9v6sXXKUI eQh5j7FbuvyWUdhavVNqb5lMP9ThJt0ssH+9S1Nhdt7HdfIBeh99CZG9Mvm1Kkcmw430rGubsT9Tr l23sHTtSxX5JidZM1kSRS1l1YgOK8rhXEnTyocPsgGrKAJIGArTKGKphpFf4svs+zYxk8+V6NLRpM WC4YL9I7IY8eYCVGsE8gOCU1Tdtb7GYBV4YFcQf1Smnj6jWDX9Ot6xwVZQ0HEfrHwv135f/hFU5US b2pMhFGA==; Received: from mailtransmit05.runbox.com ([2a0c:5a00:149::26]) by desiato.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vx3K8-00000000A6z-3inA for linux-arm-kernel@lists.infradead.org; Mon, 02 Mar 2026 13:28:38 +0000 Received: from mailtransmit02.runbox ([10.9.9.162] helo=aibo.runbox.com) by mailtransmit05.runbox.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.93) (envelope-from ) id 1vx3Jw-003bl5-Bn; Mon, 02 Mar 2026 14:28:24 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=runbox.com; s=selector2; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To :Message-Id:Date:Subject:To:From; bh=7cjIEqDAe6MTPa2yql8v8L5e7mjA+roV54bcD0Te3Y4=; b=pfYMBjDrxtDGIuseYyHfRKhdlY wxGF1P6KMNx6ObRuGN6ZC4wsAsw2hRQ/moIf5DlPtJ4OdcFDVbbZfYlXOaHjFV7UCzwT+RFpEzmxH qWXXDA4ONYMAsNi6ePJIKCLTLb8MT74QJNuqJ6sdh6Tq/4chxS0eBiQlHuCMuynNI3HaM4H+mIWD+ MfMF3aDGj96f3wG2XdkXTZREX71lpkYTiXzClo5Rgz07oqNqD1x1j5Sva9T4TMi13zMpJPrbafMuY y2tpwibHn24xe00sD61gejFnTEEHP9CDzwhRxR2Z0zEadqZouQs+4eZ2DS+v9eN8M5kbcQczC3zdl N7bMTDQg==; Received: from [10.9.9.73] (helo=submission02.runbox) by mailtransmit02.runbox with esmtp (Exim 4.86_2) (envelope-from ) id 1vx3Jv-0003tI-NG; Mon, 02 Mar 2026 14:28:23 +0100 Received: by submission02.runbox with esmtpsa [Authenticated ID (1493616)] (TLS1.2:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.93) id 1vx3Ji-008UTR-OY; Mon, 02 Mar 2026 14:28:10 +0100 From: david.laight.linux@gmail.com To: Alexander Viro , Andre Almeida , Andrew Cooper , Christian Borntraeger , Christian Brauner , Christophe Leroy , "Christophe Leroy (CS GROUP)" , Darren Hart , David Laight , Davidlohr Bueso , Heiko Carstens , Jan Kara , Julia Lawall , Linus Torvalds , linux-arm-kernel@lists.infradead.org, linux-fsdevel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, LKML , Madhavan Srinivasan , Mathieu Desnoyers , Michael Ellerman , Nicholas Piggin , Nicolas Palix , Palmer Dabbelt , Paul Walmsley , Peter Zijlstra , Russell King , Sven Schnelle , Thomas Gleixner , x86@kernel.org, Kees Cook , akpm@linux-foundation.org Subject: [PATCH v2 3/5] uaccess.h: Use with() and and_with() in __scoped_user_access() Date: Mon, 2 Mar 2026 13:27:53 +0000 Message-Id: <20260302132755.1475451-4-david.laight.linux@gmail.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20260302132755.1475451-1-david.laight.linux@gmail.com> References: <20260302132755.1475451-1-david.laight.linux@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260302_132837_102582_1E632227 X-CRM114-Status: GOOD ( 11.73 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: David Laight Wrappers for autoterminating nested for() loops have been added to compiler.h, use them to hide the gory details. Signed-off-by: David Laight --- include/linux/uaccess.h | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h index 809e4f7dfdbd..64bc2492eb99 100644 --- a/include/linux/uaccess.h +++ b/include/linux/uaccess.h @@ -736,13 +736,10 @@ static __always_inline void __scoped_user_rw_access_end(const void *p) * * Don't use directly. Use scoped_masked_user_$MODE_access() instead. */ -#define __scoped_user_access(mode, uptr, size, elbl) \ -for (bool done = false; !done; done = true) \ - for (auto _tmpptr = __scoped_user_access_begin(mode, uptr, size, elbl); \ - !done; done = true) \ - /* Force modified pointer usage within the scope */ \ - for (const auto uptr __cleanup(__scoped_user_##mode##_access_end) = \ - _tmpptr; !done; done = true) +#define __scoped_user_access(mode, uptr, size, elbl) \ + with (auto _tmpptr = __scoped_user_access_begin(mode, uptr, size, elbl)) \ + /* Force modified pointer usage within the scope */ \ + and_with (const auto uptr __cleanup(__scoped_user_##mode##_access_end) = _tmpptr) /** * scoped_user_read_access_size - Start a scoped user read access with given size -- 2.39.5