From patchwork Mon Feb 19 19:44:58 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 10228791 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 49B01602B7 for ; Mon, 19 Feb 2018 20:04:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3C293286E7 for ; Mon, 19 Feb 2018 20:04:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 30EF928B80; Mon, 19 Feb 2018 20:04:38 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C1A9E286E7 for ; Mon, 19 Feb 2018 20:04:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753635AbeBSTqH (ORCPT ); Mon, 19 Feb 2018 14:46:07 -0500 Received: from bombadil.infradead.org ([198.137.202.133]:44504 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753531AbeBSTqF (ORCPT ); Mon, 19 Feb 2018 14:46:05 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=8IO0rnKL1zknuNXws7LiWNSdEUpJKHZeYfIMYABSFKs=; b=a1tev8hYcg8gnIOAd/hS54HBr xpeYO9MhRUvKaxwJmgRWg7ln+imsbhYUtfkM2flS5CcAuD4Oc2JDncYe7Trl94cQiJkz/wgtkbReu 9Nvbekam1ur6f/OuW2sZZ4QqNEy9Sm2lGgfHSYnvJRizWw7GFAer+CyK6c/DMkbRSlCQiUVNyTnCP 64ssKZe5IlCPAONZLSuBFB3uBq1wYKOwp+tDSKILblIDfEEqqtt8Le3fU684VB42OiH3NbkzNo9hk PfnUVWwZ4ciPgszt24Cu7tWGLq2mxmNeaoZnjsqI61Rbg/Z3T8CY8soGsgeD5pGXqEVvVD9NAEr1+ X1ZOuAK9w==; Received: from willy by bombadil.infradead.org with local (Exim 4.89 #1 (Red Hat Linux)) id 1enrO0-0001jt-9b; Mon, 19 Feb 2018 19:46:04 +0000 From: Matthew Wilcox To: Andrew Morton Cc: Matthew Wilcox , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v7 03/61] arm64: Turn flush_dcache_mmap_lock into a no-op Date: Mon, 19 Feb 2018 11:44:58 -0800 Message-Id: <20180219194556.6575-4-willy@infradead.org> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180219194556.6575-1-willy@infradead.org> References: <20180219194556.6575-1-willy@infradead.org> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Matthew Wilcox ARM64 doesn't walk the VMA tree in its flush_dcache_page() implementation, so has no need to take the tree_lock. Signed-off-by: Matthew Wilcox Reviewed-by: Will Deacon --- arch/arm64/include/asm/cacheflush.h | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/arm64/include/asm/cacheflush.h b/arch/arm64/include/asm/cacheflush.h index bef9f418f089..550b0abea953 100644 --- a/arch/arm64/include/asm/cacheflush.h +++ b/arch/arm64/include/asm/cacheflush.h @@ -137,10 +137,8 @@ static inline void __flush_icache_all(void) dsb(ish); } -#define flush_dcache_mmap_lock(mapping) \ - spin_lock_irq(&(mapping)->tree_lock) -#define flush_dcache_mmap_unlock(mapping) \ - spin_unlock_irq(&(mapping)->tree_lock) +#define flush_dcache_mmap_lock(mapping) do { } while (0) +#define flush_dcache_mmap_unlock(mapping) do { } while (0) /* * We don't appear to need to do anything here. In fact, if we did, we'd