From patchwork Fri Mar 17 10:57:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ryan Roberts X-Patchwork-Id: 13178886 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 DC36EC7618B for ; Fri, 17 Mar 2023 10:59:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=zC+uk+Vp6p5OHxBOyf//XZB5eTdv0WRFpkOaDwL9Gfk=; b=gN/9UG79yFj88h cKMdjOnYILRjNEC7oH5/T8hBpEOao6Pl858rKwfqDWnNwArApJ47S99gXXmEkzCAOPwKlAHm6d0Vy j8zyTZ9TTDE5YILXmFcQZRRijWysnBgtrwp/w6NTu+peZWSYemoQEY3iypNSrE0ezA595v0n2tvrG zq9nOxGog5XjiYqDUguWfyCWAB3RMaBXEQ36u9YGwCpzD2Trat7CYLLgnnh2y0YY141Zs4763L4aJ 8B0gVS7WF06hfcRM9tZaGbHXVoi8c1HKpszFRpXOlFWijIhhskZPke7XLwW3zRwMw1eczTt4bBiJA 07w0OGmWCgUPEub1+eRA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pd7n7-001yAE-1t; Fri, 17 Mar 2023 10:58:33 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1pd7my-001y3K-0B for linux-arm-kernel@lists.infradead.org; Fri, 17 Mar 2023 10:58:27 +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 D83851763; Fri, 17 Mar 2023 03:59:05 -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 1DD5F3F885; Fri, 17 Mar 2023 03:58:21 -0700 (PDT) From: Ryan Roberts To: Andrew Morton , "Matthew Wilcox (Oracle)" , "Yin, Fengwei" , Yu Zhao Cc: Ryan Roberts , linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org Subject: [RFC PATCH 1/6] mm: Expose clear_huge_page() unconditionally Date: Fri, 17 Mar 2023 10:57:57 +0000 Message-Id: <20230317105802.2634004-2-ryan.roberts@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230317105802.2634004-1-ryan.roberts@arm.com> References: <20230317105802.2634004-1-ryan.roberts@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230317_035824_138241_AE6BAED3 X-CRM114-Status: UNSURE ( 9.70 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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. Signed-off-by: Ryan Roberts --- include/linux/mm.h | 3 ++- mm/memory.c | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-) -- 2.25.1 diff --git a/include/linux/mm.h b/include/linux/mm.h index 1f79667824eb..cdb8c6031d0f 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -3538,10 +3538,11 @@ enum mf_action_page_type { */ extern const struct attribute_group memory_failure_attr_group; -#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) extern void copy_user_huge_page(struct page *dst, struct page *src, unsigned long addr_hint, struct vm_area_struct *vma, diff --git a/mm/memory.c b/mm/memory.c index f456f3b5049c..c08645908ee2 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -5628,7 +5628,6 @@ void __might_fault(const char *file, int line) EXPORT_SYMBOL(__might_fault); #endif -#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 @@ -5716,6 +5715,8 @@ void clear_huge_page(struct page *page, process_huge_page(addr_hint, pages_per_huge_page, clear_subpage, page); } +#if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_HUGETLBFS) + static void copy_user_gigantic_page(struct page *dst, struct page *src, unsigned long addr, struct vm_area_struct *vma,