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 X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 223E3C2D0EA for ; Wed, 8 Apr 2020 12:00:45 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id CAB622083E for ; Wed, 8 Apr 2020 12:00:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="qBbgX++1" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CAB622083E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id A0E4B8E0019; Wed, 8 Apr 2020 08:00:41 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 9993D8E0016; Wed, 8 Apr 2020 08:00:41 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 8606D8E0019; Wed, 8 Apr 2020 08:00:41 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0178.hostedemail.com [216.40.44.178]) by kanga.kvack.org (Postfix) with ESMTP id 68C1B8E0016 for ; Wed, 8 Apr 2020 08:00:41 -0400 (EDT) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 2CA05A8F4 for ; Wed, 8 Apr 2020 12:00:41 +0000 (UTC) X-FDA: 76684545882.17.boats28_2308d2fb34718 X-HE-Tag: boats28_2308d2fb34718 X-Filterd-Recvd-Size: 4048 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf49.hostedemail.com (Postfix) with ESMTP for ; Wed, 8 Apr 2020 12:00:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=PTLovE2hoWoaJSeKjEPYtv2zFcEJY2sjZbxxW8f2wTw=; b=qBbgX++1L6mbdTJxAcMrWN4t2V u9WDZZC7mdQwUsrShnSL1UCdGBL3YYnIasKmmUdle7ux+K9NWAgFSn/8Z5Or/h5l2CXPBlEhJaH+s 7ypYs8p8BFOakK1MBY+tZJqmU5FM7x+7mgGUTK0kaWjDdtB/i2g1gUOXjrGk3zunKwTyBeQcr7KsM jNBqMl/FSUWjf6f2hjNz2Fvg/spu5FxPMzkL8oana1Lk1b57TUxB8aSrns98Hs9ZP2LUsOwg/TcD1 rV7BNeoVKk0JT391TnMyrKkrAgnqchbkGEaxqIGZfbm809OuI2n9SWJ28rGJFmfQY4V67OQKZ9BkQ 2Rxzsv0Q==; Received: from [2001:4bb8:180:5765:65b6:f11e:f109:b151] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jM9NF-0002CS-3L; Wed, 08 Apr 2020 12:00:06 +0000 From: Christoph Hellwig To: Andrew Morton , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , x86@kernel.org, David Airlie , Daniel Vetter , Laura Abbott , Sumit Semwal , Sakari Ailus , Minchan Kim , Nitin Gupta Cc: Robin Murphy , Christophe Leroy , Peter Zijlstra , linuxppc-dev@lists.ozlabs.org, linux-hyperv@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-s390@vger.kernel.org, bpf@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 10/28] mm: only allow page table mappings for built-in zsmalloc Date: Wed, 8 Apr 2020 13:59:08 +0200 Message-Id: <20200408115926.1467567-11-hch@lst.de> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200408115926.1467567-1-hch@lst.de> References: <20200408115926.1467567-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This allows to unexport map_vm_area and unmap_kernel_range, which are rather deep internal and should not be available to modules. Signed-off-by: Christoph Hellwig --- mm/Kconfig | 2 +- mm/vmalloc.c | 2 -- 2 files changed, 1 insertion(+), 3 deletions(-) diff --git a/mm/Kconfig b/mm/Kconfig index 36949a9425b8..614cc786b519 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -702,7 +702,7 @@ config ZSMALLOC =20 config ZSMALLOC_PGTABLE_MAPPING bool "Use page table mapping to access object in zsmalloc" - depends on ZSMALLOC + depends on ZSMALLOC=3Dy help By default, zsmalloc uses a copy-based object mapping method to access allocations that span two pages. However, if a particular diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 3375f9508ef6..9183fc0d365a 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -2046,7 +2046,6 @@ void unmap_kernel_range(unsigned long addr, unsigne= d long size) vunmap_page_range(addr, end); flush_tlb_kernel_range(addr, end); } -EXPORT_SYMBOL_GPL(unmap_kernel_range); =20 int map_vm_area(struct vm_struct *area, pgprot_t prot, struct page **pag= es) { @@ -2058,7 +2057,6 @@ int map_vm_area(struct vm_struct *area, pgprot_t pr= ot, struct page **pages) =20 return err > 0 ? 0 : err; } -EXPORT_SYMBOL_GPL(map_vm_area); =20 static inline void setup_vmalloc_vm_locked(struct vm_struct *vm, struct vmap_area *va, unsigned long flags, const void *caller) --=20 2.25.1