From patchwork Wed Nov 22 21:06:46 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matthew Wilcox X-Patchwork-Id: 10071131 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 14EF260353 for ; Wed, 22 Nov 2017 21:18:15 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 089BD29D67 for ; Wed, 22 Nov 2017 21:18:15 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id F19CF29DA0; Wed, 22 Nov 2017 21:18:14 +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 8CD6629D67 for ; Wed, 22 Nov 2017 21:18:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751853AbdKVVIT (ORCPT ); Wed, 22 Nov 2017 16:08:19 -0500 Received: from bombadil.infradead.org ([65.50.211.133]:36823 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751459AbdKVVIQ (ORCPT ); Wed, 22 Nov 2017 16:08:16 -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=Qtbo+1V2svGRcwcZ9OW+iXREZnw6hNM2Jr6KcIpXIU4=; b=cfEEdEpgolRUZP1SfrdyNpfKp Iv+sZcjQzeGP1Q9XlJN8ZYkgZYYHdVi3OUKnE5Ryv6SGZ5wyuP4yKwLMPR758O3R7cqWkk6t25JXp coe1Ukoh8qt8QAoBEMdV3+o0AfDFWgbNLx4wm4roCEtwkVClCJinmFdL5YsE2GTUhevMdHVbn1+Z8 8W0cCqJAZCltcwUpFd13B3Ytj/Q9FDo45ntcGMVT6xsdtwGKa2t/gUJVbI4nA8ycky7F2bFJO6NUB //8LNQi65grxtsz4zcavD3N36dUTxe59AVYJjPeUc+OD1uxRPS6gmAewArCHsDKxPmS7EZmjGVuNH x8nt2NWxw==; Received: from willy by bombadil.infradead.org with local (Exim 4.87 #1 (Red Hat Linux)) id 1eHcFk-0007sR-Ia; Wed, 22 Nov 2017 21:08:16 +0000 From: Matthew Wilcox To: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Matthew Wilcox , com@infradead.org Subject: [PATCH 09/62] arm64: Turn flush_dcache_mmap_lock into a no-op Date: Wed, 22 Nov 2017 13:06:46 -0800 Message-Id: <20171122210739.29916-10-willy@infradead.org> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20171122210739.29916-1-willy@infradead.org> References: <20171122210739.29916-1-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 76d1cc85d5b1..568f83533f12 100644 --- a/arch/arm64/include/asm/cacheflush.h +++ b/arch/arm64/include/asm/cacheflush.h @@ -130,10 +130,8 @@ 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