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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) by smtp.lore.kernel.org (Postfix) with ESMTP id ECA59C25B7C for ; Tue, 28 May 2024 09:26:45 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4VpRl50pCQz88VB for ; Tue, 28 May 2024 19:18:25 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=huawei.com (client-ip=45.249.212.189; helo=szxga03-in.huawei.com; envelope-from=tongtiangen@huawei.com; receiver=lists.ozlabs.org) Received: from szxga03-in.huawei.com (szxga03-in.huawei.com [45.249.212.189]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4VpRkR1MYyz885v for ; Tue, 28 May 2024 19:17:51 +1000 (AEST) Received: from mail.maildlp.com (unknown [172.19.88.194]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4VpRFS2mtVzPnc9; Tue, 28 May 2024 16:56:12 +0800 (CST) Received: from kwepemm600017.china.huawei.com (unknown [7.193.23.234]) by mail.maildlp.com (Postfix) with ESMTPS id E62E6141EC8; Tue, 28 May 2024 16:59:20 +0800 (CST) Received: from localhost.localdomain (10.175.112.125) by kwepemm600017.china.huawei.com (7.193.23.234) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Tue, 28 May 2024 16:59:18 +0800 From: Tong Tiangen To: Mark Rutland , Catalin Marinas , Will Deacon , Andrew Morton , James Morse , Robin Murphy , Andrey Konovalov , Dmitry Vyukov , Vincenzo Frascino , Michael Ellerman , Nicholas Piggin , Andrey Ryabinin , Alexander Potapenko , Christophe Leroy , Aneesh Kumar K.V , "Naveen N. Rao" , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , , "H. Peter Anvin" Subject: [PATCH v12 1/6] uaccess: add generic fallback version of copy_mc_to_user() Date: Tue, 28 May 2024 16:59:10 +0800 Message-ID: <20240528085915.1955987-2-tongtiangen@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240528085915.1955987-1-tongtiangen@huawei.com> References: <20240528085915.1955987-1-tongtiangen@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.175.112.125] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To kwepemm600017.china.huawei.com (7.193.23.234) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: wangkefeng.wang@huawei.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Tong Tiangen , Guohanjun , linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" x86/powerpc has it's implementation of copy_mc_to_user(), we add generic fallback in include/linux/uaccess.h prepare for other architechures to enable CONFIG_ARCH_HAS_COPY_MC. Signed-off-by: Tong Tiangen Acked-by: Michael Ellerman --- arch/powerpc/include/asm/uaccess.h | 1 + arch/x86/include/asm/uaccess.h | 1 + include/linux/uaccess.h | 8 ++++++++ 3 files changed, 10 insertions(+) diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h index de10437fd206..df42e6ad647f 100644 --- a/arch/powerpc/include/asm/uaccess.h +++ b/arch/powerpc/include/asm/uaccess.h @@ -381,6 +381,7 @@ copy_mc_to_user(void __user *to, const void *from, unsigned long n) return n; } +#define copy_mc_to_user copy_mc_to_user #endif extern long __copy_from_user_flushcache(void *dst, const void __user *src, diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h index 0f9bab92a43d..309f2439327e 100644 --- a/arch/x86/include/asm/uaccess.h +++ b/arch/x86/include/asm/uaccess.h @@ -497,6 +497,7 @@ copy_mc_to_kernel(void *to, const void *from, unsigned len); unsigned long __must_check copy_mc_to_user(void __user *to, const void *from, unsigned len); +#define copy_mc_to_user copy_mc_to_user #endif /* diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h index 3064314f4832..0dfa9241b6ee 100644 --- a/include/linux/uaccess.h +++ b/include/linux/uaccess.h @@ -205,6 +205,14 @@ copy_mc_to_kernel(void *dst, const void *src, size_t cnt) } #endif +#ifndef copy_mc_to_user +static inline unsigned long __must_check +copy_mc_to_user(void *dst, const void *src, size_t cnt) +{ + return copy_to_user(dst, src, cnt); +} +#endif + static __always_inline void pagefault_disabled_inc(void) { current->pagefault_disabled++; -- 2.25.1