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=-10.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 7F81AC43387 for ; Fri, 11 Jan 2019 14:20:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 45E87218A4 for ; Fri, 11 Jan 2019 14:20:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1547216413; bh=9iIz9UCsY5sDBdWwKM2VQAYPqVq0eat760P5R2dyhR8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=eqAwoBJ+oSnwgq9IVkEIm4/ixRqMXxdV5hoQ5abubhaggbHxZC5UPiAnfKpke/Ik7 6ZSMjEOzvVA6ql76J9MWEW4nRHdqPc1N77kbrO8b1UyMVDHX0G9SOX/blOZNkY4Bav NFQMFZiSnP559eIBmO+8HbcK4Td7UFfkrPNPDaxI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388066AbfAKOUM (ORCPT ); Fri, 11 Jan 2019 09:20:12 -0500 Received: from mail.kernel.org ([198.145.29.99]:37650 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388054AbfAKOUH (ORCPT ); Fri, 11 Jan 2019 09:20:07 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 36C042184C; Fri, 11 Jan 2019 14:20:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1547216406; bh=9iIz9UCsY5sDBdWwKM2VQAYPqVq0eat760P5R2dyhR8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TI9rQtZv/AmUdaUSXEhj+M83iuIwMzhabta9XRB1EhoyJbS1i+iGuWCL7IwZtaUDn oxR2cK76g+7TvkC/Beh9YdwdCrntWkKMOoypSBr19wAdtIexwfJ/mQcEFfR+0on4Af axStaArGB8VXbHm3njryztuB3bjRrswkfnctrUXU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, James Hogan , Huacai Chen , Paul Burton , Ralf Baechle , James Hogan , "Steven J . Hill" , linux-mips@linux-mips.org, Fuxin Zhang , Zhangjin Wu Subject: [PATCH 4.4 51/88] MIPS: Ensure pmd_present() returns false after pmd_mknotpresent() Date: Fri, 11 Jan 2019 15:08:20 +0100 Message-Id: <20190111131053.606551681@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190111131045.137499039@linuxfoundation.org> References: <20190111131045.137499039@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.4-stable 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 Cc: # 3.8+ Signed-off-by: Greg Kroah-Hartman --- 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; }