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 Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8DE17C44508 for ; Tue, 14 Jul 2026 14:08:27 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [127.0.0.1]) by lists.ozlabs.org (Postfix) with ESMTP id 4h01P46FZ3z2yY0; Wed, 15 Jul 2026 00:08:24 +1000 (AEST) Authentication-Results: lists.ozlabs.org; arc=none smtp.remote-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1784038104; cv=none; b=ZYymYmgebFVhmE+zNqgRE+vo3E2+nqdQcYGG8lWFgyfU5fsoZBLsi/k0aCjxNBJAqoyxZYjBeyA/u2xERPsoP3Yymz4c/dcrWm9AeiK6stKtkRPb4GAPbJR1qmQ6BeKqD15sHSL4RYmM8FFcPGvEblFOeKWFGM4xzj4Yww2c0njmfnQinFSutktPI3RQJSXFelwSEJfVLsujipCA9zjGBQdEdZr25dFGJ7qalOGM8oN5bLFw+es+t1uAfIKMcDC69c8wZwujbmC2EqRxjU9oC51m3FfqBbT3ljSDs8y10s6ScSalam0FOtvAoGPBAm+VtEdK6DAsJS7KZNXffG0+NA== ARC-Message-Signature: i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1784038104; c=relaxed/relaxed; bh=NDua9YY87aM7LX6RKGHHq5cosBzReZwnFG+9/6p63CY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=U5hvlEiHGVvbniN6rqgEc9TWr/V4w1RecmEC3BW6Mixw7TGrMCCNGR/10vqlpj5pDeM21ZTtOkILShlhzwEz8bc1kE9YC5Pjs2fKUA0ezyDsvTVq4bwiBeSxWwBFpLXG7/je8CVvCYI3PjrTNOkM7h/5UNqY+XxSiWmtEZ8BM0Es6MXnSAh4du9qJgRP2ufV3/4LJRlI4HosoVagU6SlLb2rXdLxbWhHQ0rbOfJ9L8CPtk4R7P44HnLimeIDJvVe3fq3O31ofqj7yaUsF9nkWIQPAmJefrAkEN4U4GhKIUtzjvWd8KEP+2HKOCRxFBbtqfiMTvdmoxuqFR4nKW3dRA== ARC-Authentication-Results: i=1; lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=arm.com; dkim=pass (1024-bit key; unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=vjhfq5hu; dkim-atps=neutral; spf=pass (client-ip=217.140.110.172; helo=foss.arm.com; envelope-from=kevin.brodsky@arm.com; receiver=lists.ozlabs.org) smtp.mailfrom=arm.com Authentication-Results: lists.ozlabs.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: lists.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss header.b=vjhfq5hu; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=arm.com (client-ip=217.140.110.172; helo=foss.arm.com; envelope-from=kevin.brodsky@arm.com; receiver=lists.ozlabs.org) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lists.ozlabs.org (Postfix) with ESMTP id 4h01P34d8Gz3brH for ; Wed, 15 Jul 2026 00:08:23 +1000 (AEST) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 2DE4E1CE0; Tue, 14 Jul 2026 07:07:48 -0700 (PDT) Received: from localhost.localdomain (e123572-lin.cambridge.arm.com [10.2.208.46]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 0A8183F7B4; Tue, 14 Jul 2026 07:07:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1784038072; bh=8oYQ9MXuYWmm90weLSF/t4FrSgRMmgMLSgcdK785vME=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=vjhfq5hujZgmkhySuJNw6Ovi0ZDPllrwytdpUl1CFaMMmQ7YlrA+FTdxr6ytaSSAO 1u9NsJ08KRRDg8iJcOgusKSxciglroRswKdfyUOkoGu8QXjmncAKV2aqeRer5z/ygB q8OYyTsSmA+9Qr1jQYJQdHlBqhCMBgipf8FFPhm0= From: Kevin Brodsky Date: Tue, 14 Jul 2026 15:04:10 +0100 Subject: [PATCH 21/22] arm: mm: drop ctor call for kernel page tables X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260714-remove_pgtable_cdtor-v1-21-44be8a7685d7@arm.com> References: <20260714-remove_pgtable_cdtor-v1-0-44be8a7685d7@arm.com> In-Reply-To: <20260714-remove_pgtable_cdtor-v1-0-44be8a7685d7@arm.com> To: linux-mm@kvack.org Cc: Kevin Brodsky , Andrew Morton , David Hildenbrand , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Pasha Tatashin , Russell King , Catalin Marinas , Will Deacon , Ryan Roberts , linux-arm-kernel@lists.infradead.org, Huacai Chen , loongarch@lists.linux.dev, "James E.J. Bottomley" , Helge Deller , linux-parisc@vger.kernel.org, Madhavan Srinivasan , Michael Ellerman , linuxppc-dev@lists.ozlabs.org, Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-riscv@lists.infradead.org, Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Gerald Schaefer , linux-s390@vger.kernel.org, "David S. Miller" , Andreas Larsson , sparclinux@vger.kernel.org, Richard Weinberger , Anton Ivanov , Johannes Berg , linux-um@lists.infradead.org, Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Andy Lutomirski , Peter Zijlstra , Ning Sun , x86@kernel.org, tboot-devel@lists.sourceforge.net, Ard Biesheuvel , Ilias Apalodimas , linux-efi@vger.kernel.org, Vishal Moola , Alistair Popple , "Matthew Wilcox (Oracle)" , linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1784037902; l=861; i=kevin.brodsky@arm.com; s=20260427; h=from:subject:message-id; bh=8oYQ9MXuYWmm90weLSF/t4FrSgRMmgMLSgcdK785vME=; b=nhPVpPwxc0Tgep45F4r22gVJiYH4IqNiA/Z9S3Ix77hbH+m9X9zzxN6EovZVFIEF1e8oAreuL YHrL6dXW1utB0IBYjmbnRvx5pXQ0zPIU5EqMprfu37YqfA5Aaxh0XUC X-Developer-Key: i=kevin.brodsky@arm.com; a=ed25519; pk=N2QG+eJKrvkNovwhhwJhnJ4+ScVfsGCHldmqLfcMTFs= Thanks to recent changes: * pagetable_pte_ctor() does nothing for kernel page tables. * efi_mm is also treated like a kernel mm by the page table logic, including ctors. We can therefore drop the ctor call when allocating special kernel page tables in mmu.c. Signed-off-by: Kevin Brodsky --- arch/arm/mm/mmu.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index 23b87b5ef7f1..c8de77a6f01e 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -728,8 +728,7 @@ static void *__init late_alloc(unsigned long sz) void *ptdesc = pagetable_alloc(GFP_PGTABLE_KERNEL & ~__GFP_HIGHMEM, get_order(sz)); - if (!ptdesc || !pagetable_pte_ctor(NULL, ptdesc)) - BUG(); + BUG_ON(!ptdesc); return ptdesc_address(ptdesc); } -- 2.51.2