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=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,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 CC79EC4321D for ; Thu, 23 Aug 2018 09:09:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 87ED7208C2 for ; Thu, 23 Aug 2018 09:09:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 87ED7208C2 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388578AbeHWMhy (ORCPT ); Thu, 23 Aug 2018 08:37:54 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:56350 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729119AbeHWMhy (ORCPT ); Thu, 23 Aug 2018 08:37:54 -0400 Received: from localhost (5355525A.cm-6-6b.dynamic.ziggo.nl [83.85.82.90]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 57E91CA0; Thu, 23 Aug 2018 09:09:08 +0000 (UTC) From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dave Hansen , Thomas Gleixner , keescook@google.com, aarcange@redhat.com, jgross@suse.com, jpoimboe@redhat.com, peterz@infradead.org, hughd@google.com, torvalds@linux-foundation.org, bp@alien8.de, luto@kernel.org, ak@linux.intel.com Subject: [PATCH 4.17 305/324] x86/mm/init: Add helper for freeing kernel image pages Date: Thu, 23 Aug 2018 09:56:11 +0200 Message-Id: <20180823075011.331600305@linuxfoundation.org> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180823074955.885811006@linuxfoundation.org> References: <20180823074955.885811006@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: Dave Hansen commit 6ea2738e0ca0e626c75202fb051c1e88d7a950fa upstream. When chunks of the kernel image are freed, free_init_pages() is used directly. Consolidate the three sites that do this. Also update the string to give an incrementally better description of that memory versus what was there before. Signed-off-by: Dave Hansen Signed-off-by: Thomas Gleixner Cc: keescook@google.com Cc: aarcange@redhat.com Cc: jgross@suse.com Cc: jpoimboe@redhat.com Cc: gregkh@linuxfoundation.org Cc: peterz@infradead.org Cc: hughd@google.com Cc: torvalds@linux-foundation.org Cc: bp@alien8.de Cc: luto@kernel.org Cc: ak@linux.intel.com Cc: Kees Cook Cc: Andrea Arcangeli Cc: Juergen Gross Cc: Josh Poimboeuf Cc: Greg Kroah-Hartman Cc: Peter Zijlstra Cc: Hugh Dickins Cc: Linus Torvalds Cc: Borislav Petkov Cc: Andy Lutomirski Cc: Andi Kleen Link: https://lkml.kernel.org/r/20180802225829.FE0E32EA@viggo.jf.intel.com Signed-off-by: Greg Kroah-Hartman --- arch/x86/include/asm/processor.h | 1 + arch/x86/mm/init.c | 15 ++++++++++++--- arch/x86/mm/init_64.c | 4 ++-- 3 files changed, 15 insertions(+), 5 deletions(-) --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -980,6 +980,7 @@ static inline uint32_t hypervisor_cpuid_ extern unsigned long arch_align_stack(unsigned long sp); extern void free_init_pages(char *what, unsigned long begin, unsigned long end); +extern void free_kernel_image_pages(void *begin, void *end); void default_idle(void); #ifdef CONFIG_XEN --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -775,13 +775,22 @@ void free_init_pages(char *what, unsigne } } +/* + * begin/end can be in the direct map or the "high kernel mapping" + * used for the kernel image only. free_init_pages() will do the + * right thing for either kind of address. + */ +void free_kernel_image_pages(void *begin, void *end) +{ + free_init_pages("unused kernel image", + (unsigned long)begin, (unsigned long)end); +} + void __ref free_initmem(void) { e820__reallocate_tables(); - free_init_pages("unused kernel", - (unsigned long)(&__init_begin), - (unsigned long)(&__init_end)); + free_kernel_image_pages(&__init_begin, &__init_end); } #ifdef CONFIG_BLK_DEV_INITRD --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -1283,8 +1283,8 @@ void mark_rodata_ro(void) set_memory_ro(start, (end-start) >> PAGE_SHIFT); #endif - free_init_pages("unused kernel", text_end, rodata_start); - free_init_pages("unused kernel", rodata_end, _sdata); + free_kernel_image_pages((void *)text_end, (void *)rodata_start); + free_kernel_image_pages((void *)rodata_end, (void *)_sdata); debug_checkwx();