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 D3E6BC4332F for ; Tue, 1 Nov 2022 17:47:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=sSFaxEda3IxOqVeeG/UanArroskjZpM0HqFmVGcXY3E=; b=jGXJOnFSQlfB3v N3BIjsEfGER/Lq4PGB7UL1FhHZGgLerMb3chfa13evnZ1irgOBDvPWItSfxkJvh/Uc574RewWGzdG KpPNcKO3Q32u3FlN7GjmtEQi3uCjE8sm0QT6zXbnfpsY+voqo5fbtP1uEL8hu+FrKp0q9PF+SJHbn jehJiKYtVrgCdk1SIQwXXshR8HtotNXm6rOG4/Q0Kr9NGIqJGeH3hHU57TMII8D0haZK/8rwtviKe XWqi2DBi6BMA3ak2uX8TIta4Lhiv9nmJzpb4k2uB7CpzH3CSnuZmqjUriBGzlbrfC/zGHyeS+WQdR fXldo5Tg9dXLjsBMcZCQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1opvMA-006MRa-Ev; Tue, 01 Nov 2022 17:47:22 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1opvM6-006MP9-3u; Tue, 01 Nov 2022 17:47:19 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id DE9F2616A8; Tue, 1 Nov 2022 17:47:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2CD53C433D6; Tue, 1 Nov 2022 17:47:05 +0000 (UTC) Date: Tue, 1 Nov 2022 17:47:01 +0000 From: Catalin Marinas To: Kefeng Wang Cc: Andrew Morton , linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-xtensa@linux-xtensa.org, linux-fsdevel@vger.kernel.org, Richard Henderson , Ivan Kokshaysky , Matt Turner , Vineet Gupta , Russell King , Will Deacon , Guo Ren , Huacai Chen , WANG Xuerui , Geert Uytterhoeven , Greg Ungerer , Michal Simek , Thomas Bogendoerfer , Dinh Nguyen , Jonas Bonn , Stefan Kristiansson , Stafford Horne , "James E . J . Bottomley" , Helge Deller , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Paul Walmsley , Palmer Dabbelt , Albert Ou , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Yoshinori Sato , Rich Felker , "David S . Miller" , Richard Weinberger , Anton Ivanov , Johannes Berg , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H . Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Chris Zankel , Max Filippov Subject: Re: [PATCH] mm: remove kern_addr_valid() completely Message-ID: References: <20221018074014.185687-1-wangkefeng.wang@huawei.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20221018074014.185687-1-wangkefeng.wang@huawei.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221101_104718_212746_2FA9E425 X-CRM114-Status: GOOD ( 12.81 ) X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+linux-snps-arc=archiver.kernel.org@lists.infradead.org On Tue, Oct 18, 2022 at 03:40:14PM +0800, Kefeng Wang wrote: > Most architectures(except arm64/x86/sparc) simply return 1 for > kern_addr_valid(), which is only used in read_kcore(), and it > calls copy_from_kernel_nofault() which could check whether the > address is a valid kernel address, so no need kern_addr_valid(), > let's remove unneeded kern_addr_valid() completely. > > Signed-off-by: Kefeng Wang For arm64: Acked-by: Catalin Marinas _______________________________________________ linux-snps-arc mailing list linux-snps-arc@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-snps-arc