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 8A401C2BB1D for ; Wed, 8 Apr 2020 12:00:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5B40C20A8B for ; Wed, 8 Apr 2020 12:00:36 +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" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728896AbgDHMAf (ORCPT ); Wed, 8 Apr 2020 08:00:35 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:48586 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728890AbgDHMAe (ORCPT ); Wed, 8 Apr 2020 08:00:34 -0400 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 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org 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 config ZSMALLOC_PGTABLE_MAPPING bool "Use page table mapping to access object in zsmalloc" - depends on ZSMALLOC + depends on ZSMALLOC=y 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, unsigned long size) vunmap_page_range(addr, end); flush_tlb_kernel_range(addr, end); } -EXPORT_SYMBOL_GPL(unmap_kernel_range); int map_vm_area(struct vm_struct *area, pgprot_t prot, struct page **pages) { @@ -2058,7 +2057,6 @@ int map_vm_area(struct vm_struct *area, pgprot_t prot, struct page **pages) return err > 0 ? 0 : err; } -EXPORT_SYMBOL_GPL(map_vm_area); static inline void setup_vmalloc_vm_locked(struct vm_struct *vm, struct vmap_area *va, unsigned long flags, const void *caller) -- 2.25.1