From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from szxga07-in.huawei.com (szxga07-in.huawei.com [45.249.212.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EB62770819 for ; Mon, 9 Dec 2024 02:43:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.35 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733712211; cv=none; b=D+0y0yfd3ovF8mqAZLrNErE5O10UeQGpZwL56VhrvZc21jqGXHADEwH8nCrklED62xH/brbKEmNoTTSF6xTgkT0BvMrUsUGHkxeMM7a7U6VcyrRXC0enEzub74+Tfb9VsnlFnbbLnouUJ19WFDKDaB15pA20TTqZGVjJRAvAtyM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733712211; c=relaxed/simple; bh=jxKNTph6C1CZsWbI6VkDkDsY/XMXnQjr6JmwMMYeb/k=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=GNUfZp2AdRmCWmVuo95FHRIo+w5y6hSZOwQmwBjOiqZCSlDh+cCspafTA6RMCH8JTe0DI0AYb0jDyASv5LNGAdhEdJAB8B1lehvy8f0AWZjBzuy3YMEjhRibIZEHyPi3imKuu73ZuosKweAyW50HlT1y5cb9Ria+wR5dfntorAo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.35 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.88.234]) by szxga07-in.huawei.com (SkyGuard) with ESMTP id 4Y65hT6ZTFz1T6l2; Mon, 9 Dec 2024 10:40:57 +0800 (CST) Received: from kwepemk500005.china.huawei.com (unknown [7.202.194.90]) by mail.maildlp.com (Postfix) with ESMTPS id 483AF14010C; Mon, 9 Dec 2024 10:43:21 +0800 (CST) Received: from localhost.localdomain (10.175.112.125) by kwepemk500005.china.huawei.com (7.202.194.90) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Mon, 9 Dec 2024 10:43:19 +0800 From: Tong Tiangen To: Mark Rutland , Jonathan Cameron , Mauro Carvalho Chehab , 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" , Madhavan Srinivasan CC: , , , , , Tong Tiangen , , Guohanjun Subject: [PATCH v13 1/5] uaccess: add generic fallback version of copy_mc_to_user() Date: Mon, 9 Dec 2024 10:42:53 +0800 Message-ID: <20241209024257.3618492-2-tongtiangen@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20241209024257.3618492-1-tongtiangen@huawei.com> References: <20241209024257.3618492-1-tongtiangen@huawei.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To kwepemk500005.china.huawei.com (7.202.194.90) 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 Reviewed-by: Mauro Carvalho Chehab Reviewed-by: Jonathan Cameron --- 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 4f5a46a77fa2..44476d66ed13 100644 --- a/arch/powerpc/include/asm/uaccess.h +++ b/arch/powerpc/include/asm/uaccess.h @@ -403,6 +403,7 @@ 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 3a7755c1a441..3db67f44063b 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 e9c702c1908d..9d8c9f8082ff 100644 --- a/include/linux/uaccess.h +++ b/include/linux/uaccess.h @@ -239,6 +239,14 @@ 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