From nobody Mon Feb 9 00:55:15 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 408EDEB64DC for ; Mon, 26 Jun 2023 17:15:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230498AbjFZRPH (ORCPT ); Mon, 26 Jun 2023 13:15:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51278 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230517AbjFZROu (ORCPT ); Mon, 26 Jun 2023 13:14:50 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 64DB81703; Mon, 26 Jun 2023 10:14:44 -0700 (PDT) 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 31D9613D5; Mon, 26 Jun 2023 10:15:28 -0700 (PDT) Received: from e125769.cambridge.arm.com (e125769.cambridge.arm.com [10.1.196.26]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 484F93F663; Mon, 26 Jun 2023 10:14:41 -0700 (PDT) From: Ryan Roberts To: Andrew Morton , "Matthew Wilcox (Oracle)" , "Kirill A. Shutemov" , Yin Fengwei , David Hildenbrand , Yu Zhao , Catalin Marinas , Will Deacon , Geert Uytterhoeven , Christian Borntraeger , Sven Schnelle , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" Cc: Ryan Roberts , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-s390@vger.kernel.org Subject: [PATCH v1 01/10] mm: Expose clear_huge_page() unconditionally Date: Mon, 26 Jun 2023 18:14:21 +0100 Message-Id: <20230626171430.3167004-2-ryan.roberts@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230626171430.3167004-1-ryan.roberts@arm.com> References: <20230626171430.3167004-1-ryan.roberts@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" In preparation for extending vma_alloc_zeroed_movable_folio() to allocate a arbitrary order folio, expose clear_huge_page() unconditionally, so that it can be used to zero the allocated folio in the generic implementation of vma_alloc_zeroed_movable_folio(). Signed-off-by: Ryan Roberts --- include/linux/mm.h | 3 ++- mm/memory.c | 2 +- 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index 7f1741bd870a..7e3bf45e6491 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -3684,10 +3684,11 @@ enum mf_action_page_type { */ extern const struct attribute_group memory_failure_attr_group; =20 -#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS) extern void clear_huge_page(struct page *page, unsigned long addr_hint, unsigned int pages_per_huge_page); + +#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS) int copy_user_large_folio(struct folio *dst, struct folio *src, unsigned long addr_hint, struct vm_area_struct *vma); diff --git a/mm/memory.c b/mm/memory.c index fb30f7523550..3d4ea668c4d1 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -5741,7 +5741,6 @@ void __might_fault(const char *file, int line) EXPORT_SYMBOL(__might_fault); #endif =20 -#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS) /* * Process all subpages of the specified huge page with the specified * operation. The target subpage will be processed last to keep its @@ -5839,6 +5838,7 @@ void clear_huge_page(struct page *page, process_huge_page(addr_hint, pages_per_huge_page, clear_subpage, page); } =20 +#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS) static int copy_user_gigantic_page(struct folio *dst, struct folio *src, unsigned long addr, struct vm_area_struct *vma, --=20 2.25.1