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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 3EC3CC2BC11 for ; Mon, 7 Sep 2020 05:58:53 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B0FDD20838 for ; Mon, 7 Sep 2020 05:58:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="fHWbgi7Z"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="ZjbVCjEa" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B0FDD20838 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=5DxXbq4q8TzNgxoFB0PjePAwLbtwYo5M2A4TsXSwGeQ=; b=fHWbgi7ZX/Xb9lwAhS4xaLMko O0ggVyOVVZG0Doje977OS6+rh9SDFmGOvCLrDVIFgZ9Eq3JAUNhURrfA4vhQ4CVs4lBv4OVVfbLdv MyXViqUo8xPxi+0o4Ubl/gLZssoERmqy3kd13rLPhGFOZMT5XtcM/nx1eO2Dl67N+4IZV3/l6Bn8w 87WrUoo/HVuqmW7q3zpEj+TmeQ2utOesyZUkfNJSn60kQUBt0iJUxoOkdsCju9Ax+1UjhamoOBQT8 A+zWOiab5h3rAE0/Fz30hgU6Y/nDP69zTP4EGIMIzkmUTS43P6sVMBn+I2xuLb8m8U0dQbmcwCteU qDEPMqPLA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kFAAo-000419-29; Mon, 07 Sep 2020 05:58:38 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kFAAm-000409-JB for linux-riscv@merlin.infradead.org; Mon, 07 Sep 2020 05:58:36 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=VnA1aUsu5TomLCD5ptE3Uk0kKV7NqTrbQlcFxHGi76E=; b=ZjbVCjEaaehMz9voBwAM76LeuG knxGbQzTYw4TQEgvxoZ3zLglBuKA5gZRxagXF4Y+wMtgZZvYyicNS5jnluNpZofHGY8aqFz4+mBeu 8beWQhXoQzL0+rHhfvdOWElBkd9I3VboCtEexB6w+C5JiDC6HWSAhza9VO6XyaKeP1upaNVsWMMa/ suecZHC8UpqM8qVW//H1YOIIsi9Wu46EphVtBJMQFxBZwRNKhagIrcpZTwWMcsPQpvCeQDaeoX3FB fdJWyGDozNbqKC8xayzUqngpBhTFwor9nI7CE9RWylrGRYnOq/iq30vrTjz9pazYQnDEzuQ28Lopw IyodhHQQ==; Received: from [2001:4bb8:184:af1:e178:97b2:ac6b:4e16] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kFAAl-00036e-E0; Mon, 07 Sep 2020 05:58:35 +0000 From: Christoph Hellwig To: Paul Walmsley , Palmer Dabbelt , Arnd Bergmann , Alexander Viro Subject: [PATCH 7/8] riscv: implement __get_kernel_nofault and __put_user_nofault Date: Mon, 7 Sep 2020 07:58:24 +0200 Message-Id: <20200907055825.1917151-8-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200907055825.1917151-1-hch@lst.de> References: <20200907055825.1917151-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arch@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Implement the non-faulting kernel access helpers directly instead of abusing the uaccess routines under set_fs(KERNEL_DS). Signed-off-by: Christoph Hellwig --- arch/riscv/include/asm/uaccess.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/arch/riscv/include/asm/uaccess.h b/arch/riscv/include/asm/uaccess.h index b67d1c616ec348..264e52fb62b143 100644 --- a/arch/riscv/include/asm/uaccess.h +++ b/arch/riscv/include/asm/uaccess.h @@ -486,6 +486,26 @@ unsigned long __must_check clear_user(void __user *to, unsigned long n) __ret; \ }) +#define HAVE_GET_KERNEL_NOFAULT + +#define __get_kernel_nofault(dst, src, type, err_label) \ +do { \ + long __kr_err; \ + \ + __get_user_nocheck(*((type *)(dst)), (type *)(src), __kr_err); \ + if (unlikely(__kr_err)) \ + goto err_label; \ +} while (0) + +#define __put_kernel_nofault(dst, src, type, err_label) \ +do { \ + long __kr_err; \ + \ + __put_user_nocheck(*((type *)(dst)), (type *)(src), __kr_err); \ + if (unlikely(__kr_err)) \ + goto err_label; \ +} while (0) + #else /* CONFIG_MMU */ #include #endif /* CONFIG_MMU */ -- 2.28.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv