From patchwork Thu Sep 18 01:58:10 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Yalin" X-Patchwork-Id: 4928411 Return-Path: X-Original-To: patchwork-linux-arm-msm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 4A46F9F2EC for ; Thu, 18 Sep 2014 01:57:25 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id EF2BF20138 for ; Thu, 18 Sep 2014 01:58:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0BEE72017D for ; Thu, 18 Sep 2014 01:58:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757052AbaIRB6W (ORCPT ); Wed, 17 Sep 2014 21:58:22 -0400 Received: from cnbjrel02.sonyericsson.com ([219.141.167.166]:14700 "EHLO cnbjrel02.sonyericsson.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757415AbaIRB6V convert rfc822-to-8bit (ORCPT ); Wed, 17 Sep 2014 21:58:21 -0400 From: "Wang, Yalin" To: 'Will Deacon' , "'linux-kernel@vger.kernel.org'" , "'linux-arm-kernel@lists.infradead.org'" , "'linux-mm@kvack.org'" , "'linux-arm-msm@vger.kernel.org'" , 'Russell King - ARM Linux' Date: Thu, 18 Sep 2014 09:58:10 +0800 Subject: [PATCH] arm:extend the reserved mrmory for initrd to be page aligned Thread-Topic: [PATCH] arm:extend the reserved mrmory for initrd to be page aligned Thread-Index: Ac/S4/+0ZehZGKrlRN60n7cANwmttg== Message-ID: <35FD53F367049845BC99AC72306C23D103D6DB491616@CNBJMBX05.corpusers.net> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org X-Spam-Status: No, score=-5.0 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, SUSPICIOUS_RECIPS, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP this patch extend the start and end address of initrd to be page aligned, so that we can free all memory including the un-page aligned head or tail page of initrd, if the start or end address of initrd are not page aligned, the page can't be freed by free_initrd_mem() function. Signed-off-by: Yalin Wang --- arch/arm/mm/init.c | 5 +++++ arch/arm64/mm/init.c | 8 +++++++- 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index 659c75d..9221645 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -636,6 +636,11 @@ static int keep_initrd; void free_initrd_mem(unsigned long start, unsigned long end) { if (!keep_initrd) { + if (start == initrd_start) + start = round_down(start, PAGE_SIZE); + if (end == initrd_end) + end = round_up(end, PAGE_SIZE); + poison_init_mem((void *)start, PAGE_ALIGN(end) - start); free_reserved_area((void *)start, (void *)end, -1, "initrd"); } diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index 5472c24..c5512f6 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -334,8 +334,14 @@ static int keep_initrd; void free_initrd_mem(unsigned long start, unsigned long end) { - if (!keep_initrd) + if (!keep_initrd) { + if (start == initrd_start) + start = round_down(start, PAGE_SIZE); + if (end == initrd_end) + end = round_up(end, PAGE_SIZE); + free_reserved_area((void *)start, (void *)end, 0, "initrd"); + } } static int __init keepinitrd_setup(char *__unused)