From patchwork Tue Oct 2 11:06:01 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Will Deacon X-Patchwork-Id: 147968 Delivered-To: patch@linaro.org Received: by 2002:a2e:8595:0:0:0:0:0 with SMTP id b21-v6csp5007546lji; Tue, 2 Oct 2018 04:06:05 -0700 (PDT) X-Google-Smtp-Source: ACcGV63XJj5dd5M7GzIgrq1c2MTMTe3Tu6kXcVz0Q9cEzvORA2NW41dcpSLvWz502uNOYQ/Tl5fU X-Received: by 2002:a62:5882:: with SMTP id m124-v6mr15795683pfb.249.1538478365615; Tue, 02 Oct 2018 04:06:05 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1538478365; cv=none; d=google.com; s=arc-20160816; b=L6qJZqTAeUdvTZ58nRypj09anLwxFlbosCKq9tIEGcTV6V5jfjTji4VIIL0V9p4H2m FR7nXAJ0CxY1vdQnfc36n3u4VCSh3oF4dX3du6o8HLP1T0i+0tZgKNFFjlxqyCNR6gik T09/9IXBxCMtDVmi5heF63yV0wg2GLGSTzb2lVqWBf/Qp1PluvSrWQpz2khWyWNFsRyM Qye0kyMVw6yewxNegxzYvg8yMxHBIu93O0VetgLfw9GhbtGZjX89UiaVktUU4YBapBRN fk4erU8wiUhSUnXhmi0Ciw7U3NwWkuZOId/9CiRDprBrmYUNeHJ9R2evA6cgb0VtIje8 0WNQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from; bh=qqOjGbQQBgw+VVbEnWZUHYnvbPx0vTCUDG5+OY61Bac=; b=e6gFyjF+XXjiz381IiZcd83eRbuOrMwB1P0izGLnKDwLXCJnCrG63WDj3irFpo1kbC m+nis4YpAl4Qnf9FVWB62CSTGhFvsuIhI5nQPGzc+BnLnlgV8iCFpiymlLg6/tIjpYw+ y7g5cQPnzIDjiNRcT69Blb5ebSAaNap6xdNxSZgY8vOCWyd2jpW6s6gGF4SC0/9fwKvG tIxMvtA8L2iUp0AbZ8cdF1eMBvItKeIYwin7mUKlRI7yxsZ13k3GS61DJyo/dFq+vhgh Y825j3yAtv1kn6J5PlK420sXFt6pp5E+jvC16/k20UIpQDfw2tUonjM3jQMWw1yKrxYm o/Eg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 5-v6si16064721pfz.160.2018.10.02.04.06.05; Tue, 02 Oct 2018 04:06:05 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727734AbeJBRsq (ORCPT + 32 others); Tue, 2 Oct 2018 13:48:46 -0400 Received: from foss.arm.com ([217.140.101.70]:34720 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727573AbeJBRsY (ORCPT ); Tue, 2 Oct 2018 13:48:24 -0400 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 AA5EB1682; Tue, 2 Oct 2018 04:05:40 -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 7B40A3F5B7; Tue, 2 Oct 2018 04:05:40 -0700 (PDT) Received: by edgewater-inn.cambridge.arm.com (Postfix, from userid 1000) id 6DDCF1AE3E59; Tue, 2 Oct 2018 12:06:04 +0100 (BST) From: Will Deacon To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: cpandya@codeaurora.org, toshi.kani@hpe.com, tglx@linutronix.de, mhocko@suse.com, akpm@linux-foundation.org, sean.j.christopherson@intel.com, Will Deacon Subject: [PATCH v2 3/5] x86: pgtable: Drop pXd_none() checks from pXd_free_pYd_table() Date: Tue, 2 Oct 2018 12:06:01 +0100 Message-Id: <1538478363-16255-4-git-send-email-will.deacon@arm.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1538478363-16255-1-git-send-email-will.deacon@arm.com> References: <1538478363-16255-1-git-send-email-will.deacon@arm.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Now that the core code checks this for us, we don't need to do it in the backend. Cc: Chintan Pandya Cc: Toshi Kani Cc: Thomas Gleixner Cc: Michal Hocko Cc: Andrew Morton Reviewed-by: Toshi Kani Signed-off-by: Will Deacon --- arch/x86/mm/pgtable.c | 6 ------ 1 file changed, 6 deletions(-) -- 2.1.4 diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c index ae394552fb94..b4919c44a194 100644 --- a/arch/x86/mm/pgtable.c +++ b/arch/x86/mm/pgtable.c @@ -796,9 +796,6 @@ int pud_free_pmd_page(pud_t *pud, unsigned long addr) pte_t *pte; int i; - if (pud_none(*pud)) - return 1; - pmd = (pmd_t *)pud_page_vaddr(*pud); pmd_sv = (pmd_t *)__get_free_page(GFP_KERNEL); if (!pmd_sv) @@ -840,9 +837,6 @@ int pmd_free_pte_page(pmd_t *pmd, unsigned long addr) { pte_t *pte; - if (pmd_none(*pmd)) - return 1; - pte = (pte_t *)pmd_page_vaddr(*pmd); pmd_clear(pmd);