From patchwork Mon Nov 26 17:07:44 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Will Deacon X-Patchwork-Id: 152050 Delivered-To: patch@linaro.org Received: by 2002:a2e:299d:0:0:0:0:0 with SMTP id p29-v6csp91353ljp; Mon, 26 Nov 2018 09:07:46 -0800 (PST) X-Google-Smtp-Source: AFSGD/VUDB2AoOXR/NW5J13tph4g9CV5DiPwholsXnbtjO+mRo3TYyp1nrT4nHjKXj7kuJH+lWg9 X-Received: by 2002:a17:902:8ec9:: with SMTP id x9mr29144155plo.27.1543252065864; Mon, 26 Nov 2018 09:07:45 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1543252065; cv=none; d=google.com; s=arc-20160816; b=V5J+4Ga5gHJwYEPoE/uGw30tM3f1CJrwOQ6Cxmstbr66AV/2eISBhUUWvxVx2WCqoN imS/HhDIvFUgly8kT6+0CXWhNuEwA74R3h4QtZ6RUTUcoBbXnw7hp/ZoDNPZwoFIxUbA 5k3cC67n/aAqQd8/dm4LjkL9bSlAERL+9Lg33XI2V0EBrU1L+vkwP18MpndnSmNuswd5 IVFKpbTNozYX/Lm8d4e8X7p6geG4k6Cgu1NlyVw8yUNnM7gbVL1sf0olTLTJ0WL6ySmQ uwyrms5+taemQO9ZghYZtwsDV8K2GXjxmS+cICsJebEcKzeNUr/4CUaiWoO2gi/vqoL0 YMpw== 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=/V6Ii5Ay/gyCu4FDeRHUvTmr/uoACgypNN/miYDcTTU=; b=HhMnlruln440CsUwa1UAAzS5vMD+aM+USEQDoldxUTumkNr3gD6FLKimf6CJzyiARR +ey5gxVmPsiT2PyUXoVrUmLt0Keb1fm8+XsYqfgHLqdYJDAQ/aFnC2kc/GZZFSG/wwpT aTSns5I7JR4iE+Z3yphmUtNdqa4Qs58HneqKPztr8SWmpea9G+NQ91zWVpGbOaiRGABO BF2H9jSR7w3Hg4sq5moFiwvkfLdY2UJeCLiElDJZ9AtJdGeGvTT88msiedBIqBWnZjcf KnCewpl7KOc4qBomKiUiK/XvuRd3EkfRWLPQqHmkFAybQNIrsiwPZxjQh2mz0KyREIyu Hpyg== 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 y25si809125pgl.226.2018.11.26.09.07.33; Mon, 26 Nov 2018 09:07:45 -0800 (PST) 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 S1726588AbeK0ECO (ORCPT + 32 others); Mon, 26 Nov 2018 23:02:14 -0500 Received: from foss.arm.com ([217.140.101.70]:42926 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726255AbeK0ECN (ORCPT ); Mon, 26 Nov 2018 23:02:13 -0500 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 D839E168F; Mon, 26 Nov 2018 09:07:30 -0800 (PST) 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 A8CC93F906; Mon, 26 Nov 2018 09:07:30 -0800 (PST) Received: by edgewater-inn.cambridge.arm.com (Postfix, from userid 1000) id 271771AE088D; Mon, 26 Nov 2018 17:07:48 +0000 (GMT) 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 v4 2/5] arm64: mmu: Drop pXd_present() checks from pXd_free_pYd_table() Date: Mon, 26 Nov 2018 17:07:44 +0000 Message-Id: <1543252067-30831-3-git-send-email-will.deacon@arm.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1543252067-30831-1-git-send-email-will.deacon@arm.com> References: <1543252067-30831-1-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 The core code already has a check for pXd_none(), so remove it from the architecture implementation. Cc: Chintan Pandya Cc: Toshi Kani Cc: Thomas Gleixner Cc: Michal Hocko Cc: Andrew Morton Signed-off-by: Will Deacon --- arch/arm64/mm/mmu.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) -- 2.1.4 diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index d1d6601b385d..786cfa6355be 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -989,10 +989,8 @@ int pmd_free_pte_page(pmd_t *pmdp, unsigned long addr) pmd = READ_ONCE(*pmdp); - if (!pmd_present(pmd)) - return 1; if (!pmd_table(pmd)) { - VM_WARN_ON(!pmd_table(pmd)); + VM_WARN_ON(1); return 1; } @@ -1012,10 +1010,8 @@ int pud_free_pmd_page(pud_t *pudp, unsigned long addr) pud = READ_ONCE(*pudp); - if (!pud_present(pud)) - return 1; if (!pud_table(pud)) { - VM_WARN_ON(!pud_table(pud)); + VM_WARN_ON(1); return 1; }