| Message ID | 1535125966-7666-8-git-send-email-will.deacon@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show
Return-Path: <linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org> Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5390613B8 for <patchwork-linux-arm@patchwork.kernel.org>; Fri, 24 Aug 2018 15:58:03 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 43A372B6D2 for <patchwork-linux-arm@patchwork.kernel.org>; Fri, 24 Aug 2018 15:58:03 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 37BDD2B6F9; Fri, 24 Aug 2018 15:58:03 +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=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C656A2B6D2 for <patchwork-linux-arm@patchwork.kernel.org>; Fri, 24 Aug 2018 15:58:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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=LLJ3wtACkFvFO3S+9I4UGvWUFmvlwLfiZA9UXV4F1nU=; b=tw+SFGtINJSZskRbPPmWdxwPPy O3xiEjQ5iP78BhP7HCdv21tKgpmuLpoydznAf7xEFH43OzQMnRdWKH7z2xPE2HFnwz9lxnsPJQp+c 6eZbpfZ5EUi3FFyIqE4dV2t9hfnmB5PNAKbtIV4uxgd8OvODYdteWnCswFUEQhyoBre9Dt/UgXOqX NFw+pq+40cR2SUIacpIetxvhgisKb1FIdi39Pv1eMLmlInYPj0bNkBvhPZl6hgSClU4FZ4f6/mKbr IfyVFCBa38Te2vmNqsF545tJv2Bw7SHkIvGKgrwgvj+MHrXFHhBJKsJoZ3Y/7vcmN+PXAoLmJvpTo SPvXmXUg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1ftETD-0004fD-9a; Fri, 24 Aug 2018 15:57:55 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1ftEOS-0006uZ-59 for linux-arm-kernel@lists.infradead.org; Fri, 24 Aug 2018 15:53:03 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id D297D174E; Fri, 24 Aug 2018 08:52:38 -0700 (PDT) Received: from edgewater-inn.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 9FD2E3F7BE; Fri, 24 Aug 2018 08:52:38 -0700 (PDT) Received: by edgewater-inn.cambridge.arm.com (Postfix, from userid 1000) id 1BE9D1AE33A3; Fri, 24 Aug 2018 16:52:48 +0100 (BST) From: Will Deacon <will.deacon@arm.com> To: linux-kernel@vger.kernel.org Subject: [RFC PATCH 07/11] asm-generic/tlb: Guard with #ifdef CONFIG_MMU Date: Fri, 24 Aug 2018 16:52:42 +0100 Message-Id: <1535125966-7666-8-git-send-email-will.deacon@arm.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1535125966-7666-1-git-send-email-will.deacon@arm.com> References: <1535125966-7666-1-git-send-email-will.deacon@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180824_085300_288063_ECF97DC8 X-CRM114-Status: UNSURE ( 9.90 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: <linux-arm-kernel.lists.infradead.org> List-Unsubscribe: <http://lists.infradead.org/mailman/options/linux-arm-kernel>, <mailto:linux-arm-kernel-request@lists.infradead.org?subject=unsubscribe> List-Archive: <http://lists.infradead.org/pipermail/linux-arm-kernel/> List-Post: <mailto:linux-arm-kernel@lists.infradead.org> List-Help: <mailto:linux-arm-kernel-request@lists.infradead.org?subject=help> List-Subscribe: <http://lists.infradead.org/mailman/listinfo/linux-arm-kernel>, <mailto:linux-arm-kernel-request@lists.infradead.org?subject=subscribe> Cc: benh@au1.ibm.com, peterz@infradead.org, catalin.marinas@arm.com, Will Deacon <will.deacon@arm.com>, npiggin@gmail.com, torvalds@linux-foundation.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP |
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Avoid synchronous TLB invalidation for intermediate page-table entries on arm64
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expand
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diff --git a/include/asm-generic/tlb.h b/include/asm-generic/tlb.h index b3353e21f3b3..859f897d3d53 100644 --- a/include/asm-generic/tlb.h +++ b/include/asm-generic/tlb.h @@ -20,6 +20,8 @@ #include <asm/pgalloc.h> #include <asm/tlbflush.h> +#ifdef CONFIG_MMU + #ifdef CONFIG_HAVE_RCU_TABLE_FREE /* * Semi RCU freeing of the page directories. @@ -312,4 +314,5 @@ static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb, #define tlb_migrate_finish(mm) do {} while (0) +#endif /* CONFIG_MMU */ #endif /* _ASM_GENERIC__TLB_H */
The inner workings of the mmu_gather-based TLB invalidation mechanism are not relevant to nommu configurations, so guard them with an ifdef. This allows us to implement future functions using static inlines without breaking the build. Signed-off-by: Will Deacon <will.deacon@arm.com> --- include/asm-generic/tlb.h | 3 +++ 1 file changed, 3 insertions(+)