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 X-Spam-Level: X-Spam-Status: No, score=-4.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 2AA4DC4360F for ; Tue, 2 Apr 2019 13:48:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 048B520856 for ; Tue, 2 Apr 2019 13:48:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732300AbfDBNsb (ORCPT ); Tue, 2 Apr 2019 09:48:31 -0400 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:42926 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731208AbfDBNkC (ORCPT ); Tue, 2 Apr 2019 09:40:02 -0400 Received: from [167.98.27.226] (helo=deadeye) by shadbolt.decadent.org.uk with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1hBJdu-0002md-A1; Tue, 02 Apr 2019 14:39:58 +0100 Received: from ben by deadeye with local (Exim 4.92) (envelope-from ) id 1hBJdt-0004rJ-RN; Tue, 02 Apr 2019 14:39:57 +0100 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, Denis Kirjanov , "Paul Burton" , "James Hogan" , "Zhangjin Wu" , "Fuxin Zhang" , linux-mips@linux-mips.org, "Steven J . Hill" , "Ralf Baechle" , "James Hogan" , "Huacai Chen" Date: Tue, 02 Apr 2019 14:38:27 +0100 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) X-Patchwork-Hint: ignore Subject: [PATCH 3.16 11/99] MIPS: Ensure pmd_present() returns false after pmd_mknotpresent() In-Reply-To: X-SA-Exim-Connect-IP: 167.98.27.226 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.16.65-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Huacai Chen commit 92aa0718c9fa5160ad2f0e7b5bffb52f1ea1e51a upstream. This patch is borrowed from ARM64 to ensure pmd_present() returns false after pmd_mknotpresent(). This is needed for THP. References: 5bb1cc0ff9a6 ("arm64: Ensure pmd_present() returns false after pmd_mknotpresent()") Reviewed-by: James Hogan Signed-off-by: Huacai Chen Signed-off-by: Paul Burton Patchwork: https://patchwork.linux-mips.org/patch/21135/ Cc: Ralf Baechle Cc: James Hogan Cc: Steven J . Hill Cc: linux-mips@linux-mips.org Cc: Fuxin Zhang Cc: Zhangjin Wu Signed-off-by: Ben Hutchings --- arch/mips/include/asm/pgtable-64.h | 5 +++++ 1 file changed, 5 insertions(+) --- a/arch/mips/include/asm/pgtable-64.h +++ b/arch/mips/include/asm/pgtable-64.h @@ -189,6 +189,11 @@ static inline int pmd_bad(pmd_t pmd) static inline int pmd_present(pmd_t pmd) { +#ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT + if (unlikely(pmd_val(pmd) & _PAGE_HUGE)) + return pmd_val(pmd) & _PAGE_PRESENT; +#endif + return pmd_val(pmd) != (unsigned long) invalid_pte_table; }