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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 BBA36C44501 for ; Tue, 14 Jul 2026 14:08:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References :Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=NDua9YY87aM7LX6RKGHHq5cosBzReZwnFG+9/6p63CY=; b=Tupc6k8K0wNZWF0WHRPxn0XN82 0mCamR74M9ERanYs76l3u9zMv2DYme/0b9aumufWzLRu7Zs3nMJ54jw9CRGk685d9xA3C0N4gtWKf QpFj4DMQN/1LwzWRdiqKLT8iQLVSdOxAK17gGEr2yTeu+09miu2RlifzFyASGP+HU73IgigGt1UWE OEGYEk1EoMvnbhMbEv0iqQsKl3ulgVdj7s36bfNUEkTuOQroJ4CRYpiPeEU4DfAWrspyj636lHUYu FqvicNBzm/k0Mmq02EP+aQ/6Mczk++2tozn89T4vBAFRT9r/8eSN78LUKTYUHTN7z3Jqg0s285t0X HIhkWTRQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wjdnk-0000000CK8W-1mia; Tue, 14 Jul 2026 14:08:00 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wjdnh-0000000CK58-0bkQ; Tue, 14 Jul 2026 14:07:58 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Cc:To:In-Reply-To:References: Message-Id:Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date: From:Sender:Reply-To:Content-ID:Content-Description; bh=NDua9YY87aM7LX6RKGHHq5cosBzReZwnFG+9/6p63CY=; b=dz1T5NVWVFLd9u7GHFeddGhFEk z6CJ5VH9MmmWrydxHo3lCXKbEVnCzst6BCG8SF5Vj/s3EMjp/D4p2r+hu9lF5wAba3RbHiUv3JTGD gXDbS1ciXGeAumVTXgm79aWYCsEj7c9iTXmweWIy57ID6rP9qndqpDMVEqUbeOi7Ujaz6/d4fqbuH mNiL3tDYFoS+np3rsXcjyrqFvRgDANzdSMw/72BZZ/YddNH9SH+zyELHu9X6j8fQdT6hGjcmHLk0A 97XYcaXZhIC1KoXURWY2Jh2ltKBnKY81bIpgOdDDttNZDReCpjEIBdugos760ZiVs3mkni65KunjO 99/HqQ2w==; Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.99.2 #2 (Red Hat Linux)) id 1wjdnd-0000000CZf4-3pqZ; Tue, 14 Jul 2026 14:07:56 +0000 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 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= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260714_150754_298519_6786D5D4 X-CRM114-Status: GOOD ( 12.10 ) X-BeenThere: linux-um@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-um" Errors-To: linux-um-bounces+linux-um=archiver.kernel.org@lists.infradead.org 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