From patchwork Tue Nov 3 09:27:41 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 11879881 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=-6.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 1DB8EC2D0A3 for ; Wed, 4 Nov 2020 08:23:42 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 B377020781 for ; Wed, 4 Nov 2020 08:23:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="UCiLeToK"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="iNcZKx8F" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B377020781 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linutronix.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A274C6EEB9; Wed, 4 Nov 2020 08:22:49 +0000 (UTC) Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by gabe.freedesktop.org (Postfix) with ESMTPS id DF5CE6EC70; Tue, 3 Nov 2020 10:34:05 +0000 (UTC) Message-Id: <20201103095859.538827102@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1604399639; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=37l2/9hMoX995irJwwZT0VNkjmk/OwZo72GhT72QTX4=; b=UCiLeToK4AIC+9Dmx7LG5rV2mjuvYVd6Coif2Sdjhi7Si2K86UL165usKvCu+1M57a5ZTs 3lGdAzYJonKcTuvyMgrOXNx+UrIY8LVcTVNso2JLtpbkE1oygEe/wl748JnAW6AS6EsTrD c2VWZi0Trd4Jp1S58g19SzXtzA+u8eA2qRCth6y4qBL25KfIk14Y8/pIC7Pk9xx9opLe+Y fYTupCtZR4FQC2/b1qBabqi8Jfeh2ZKqUrq+V0zmNc17uiUhxxjlvxwBR152OCIcLA02mF vb+4tkvTlRO1TXdeUxGxjDkLW4Yer0R+EYHQyA+pAWiyVIPp/wbrw75o+T0ZJw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1604399639; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=37l2/9hMoX995irJwwZT0VNkjmk/OwZo72GhT72QTX4=; b=iNcZKx8Fg9QYlTcIp7Z3u6IBgHA5T+EwXNMLuSSTvrJb/3r4DH72OAUwbFyp58bawCPYfQ dJ5wikkjaG3JOhAw== Date: Tue, 03 Nov 2020 10:27:41 +0100 From: Thomas Gleixner To: LKML Subject: [patch V3 29/37] ARM: mm: Replace kmap_atomic_pfn() References: <20201103092712.714480842@linutronix.de> MIME-Version: 1.0 X-Mailman-Approved-At: Wed, 04 Nov 2020 08:22:13 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Juri Lelli , linux-aio@kvack.org, Peter Zijlstra , Sebastian Andrzej Siewior , dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, Ben Segall , Chris Mason , Huang Rui , Paul Mackerras , Gerd Hoffmann , Daniel Bristot de Oliveira , sparclinux@vger.kernel.org, Vincent Chen , Christoph Hellwig , Vincent Guittot , Paul McKenney , Max Filippov , Michael Ellerman , x86@kernel.org, Russell King , linux-csky@vger.kernel.org, Ingo Molnar , David Airlie , VMware Graphics , Mel Gorman , nouveau@lists.freedesktop.org, Dave Airlie , linux-snps-arc@lists.infradead.org, Ben Skeggs , linux-xtensa@linux-xtensa.org, Arnd Bergmann , intel-gfx@lists.freedesktop.org, Roland Scheidegger , Josef Bacik , Steven Rostedt , Linus Torvalds , Alexander Viro , spice-devel@lists.freedesktop.org, David Sterba , Rodrigo Vivi , Dietmar Eggemann , linux-arm-kernel@lists.infradead.org, Chris Zankel , Michal Simek , Thomas Bogendoerfer , Nick Hu , linux-mm@kvack.org, Vineet Gupta , linux-mips@vger.kernel.org, Christian Koenig , Benjamin LaHaise , linux-fsdevel@vger.kernel.org, Andrew Morton , linuxppc-dev@lists.ozlabs.org, "David S. Miller" , linux-btrfs@vger.kernel.org, Greentime Hu Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" There is no requirement to disable pagefaults and preemption for these cache management mappings. Replace kmap_atomic_pfn() with kmap_local_pfn(). This allows to remove kmap_atomic_pfn() in the next step. Signed-off-by: Thomas Gleixner Cc: Russell King Cc: linux-arm-kernel@lists.infradead.org --- V3: New patch --- arch/arm/mm/cache-feroceon-l2.c | 6 +++--- arch/arm/mm/cache-xsc3l2.c | 4 ++-- 2 files changed, 5 insertions(+), 5 deletions(-) --- a/arch/arm/mm/cache-feroceon-l2.c +++ b/arch/arm/mm/cache-feroceon-l2.c @@ -49,9 +49,9 @@ static inline unsigned long l2_get_va(un * we simply install a virtual mapping for it only for the * TLB lookup to occur, hence no need to flush the untouched * memory mapping afterwards (note: a cache flush may happen - * in some circumstances depending on the path taken in kunmap_atomic). + * in some circumstances depending on the path taken in kunmap_local). */ - void *vaddr = kmap_atomic_pfn(paddr >> PAGE_SHIFT); + void *vaddr = kmap_local_pfn(paddr >> PAGE_SHIFT); return (unsigned long)vaddr + (paddr & ~PAGE_MASK); #else return __phys_to_virt(paddr); @@ -61,7 +61,7 @@ static inline unsigned long l2_get_va(un static inline void l2_put_va(unsigned long vaddr) { #ifdef CONFIG_HIGHMEM - kunmap_atomic((void *)vaddr); + kunmap_local((void *)vaddr); #endif } --- a/arch/arm/mm/cache-xsc3l2.c +++ b/arch/arm/mm/cache-xsc3l2.c @@ -59,7 +59,7 @@ static inline void l2_unmap_va(unsigned { #ifdef CONFIG_HIGHMEM if (va != -1) - kunmap_atomic((void *)va); + kunmap_local((void *)va); #endif } @@ -75,7 +75,7 @@ static inline unsigned long l2_map_va(un * in place for it. */ l2_unmap_va(prev_va); - va = (unsigned long)kmap_atomic_pfn(pa >> PAGE_SHIFT); + va = (unsigned long)kmap_local_pfn(pa >> PAGE_SHIFT); } return va + (pa_offset >> (32 - PAGE_SHIFT)); #else