From patchwork Tue Sep 16 01:44:15 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Yalin" X-Patchwork-Id: 4914261 Return-Path: X-Original-To: patchwork-linux-arm@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 956E49F467 for ; Tue, 16 Sep 2014 01:46:55 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E8AF720222 for ; Tue, 16 Sep 2014 01:49:21 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C9A49201DE for ; Tue, 16 Sep 2014 01:49:20 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XThrk-000656-3x; Tue, 16 Sep 2014 01:47:36 +0000 Received: from cnbjrel01.sonyericsson.com ([219.141.167.165]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XThrg-0005sT-LV for linux-arm-kernel@lists.infradead.org; Tue, 16 Sep 2014 01:47:33 +0000 From: "Wang, Yalin" To: Russell King - ARM Linux , Jiang Liu , "'linux-mm@kvack.org'" , Will Deacon , "'linux-kernel@vger.kernel.org'" , "'linux-arm-kernel@lists.infradead.org'" Date: Tue, 16 Sep 2014 09:44:15 +0800 Subject: [PATCH v2] arm:extend __init_end to a page align address Thread-Topic: [PATCH v2] arm:extend __init_end to a page align address Thread-Index: Ac/RT7llVenLLwtMQVWZZrJ0eagO8Q== Message-ID: <35FD53F367049845BC99AC72306C23D103D6DB49160B@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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140915_184732_880049_F1FC5F80 X-CRM114-Status: GOOD ( 10.29 ) X-Spam-Score: -2.3 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable 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 change the __init_end address to a page align address, so that free_initmem() can free the whole .init section, because if the end address is not page aligned, it will round down to a page align address, then the tail unligned page will not be freed. Signed-off-by: wang --- arch/arm/kernel/vmlinux.lds.S | 2 +- arch/arm64/kernel/vmlinux.lds.S | 2 +- include/asm-generic/vmlinux.lds.h | 2 ++ 3 files changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S index 6f57cb9..8e95aa4 100644 --- a/arch/arm/kernel/vmlinux.lds.S +++ b/arch/arm/kernel/vmlinux.lds.S @@ -219,8 +219,8 @@ SECTIONS __data_loc = ALIGN(4); /* location in binary */ . = PAGE_OFFSET + TEXT_OFFSET; #else - __init_end = .; . = ALIGN(THREAD_SIZE); + __init_end = .; __data_loc = .; #endif diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S index 97f0c04..edf8715 100644 --- a/arch/arm64/kernel/vmlinux.lds.S +++ b/arch/arm64/kernel/vmlinux.lds.S @@ -97,9 +97,9 @@ SECTIONS PERCPU_SECTION(64) + . = ALIGN(PAGE_SIZE); __init_end = .; - . = ALIGN(PAGE_SIZE); _data = .; _sdata = .; RW_DATA_SECTION(64, PAGE_SIZE, THREAD_SIZE) diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 5ba0360..aa70cbd 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -40,6 +40,8 @@ * } * * [__init_begin, __init_end] is the init section that may be freed after init + * // __init_begin and __init_end should be page aligned, so that we can + * // free the whole .init memory * [_stext, _etext] is the text section * [_sdata, _edata] is the data section *