From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932095Ab3FMN2M (ORCPT ); Thu, 13 Jun 2013 09:28:12 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:8481 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1758178Ab3FMN2E (ORCPT ); Thu, 13 Jun 2013 09:28:04 -0400 X-IronPort-AV: E=Sophos;i="4.87,858,1363104000"; d="scan'208";a="7537690" From: Tang Chen To: tglx@linutronix.de, mingo@elte.hu, hpa@zytor.com, akpm@linux-foundation.org, tj@kernel.org, trenn@suse.de, yinghai@kernel.org, jiang.liu@huawei.com, wency@cn.fujitsu.com, laijs@cn.fujitsu.com, isimatu.yasuaki@jp.fujitsu.com, mgorman@suse.de, minchan@kernel.org, mina86@mina86.com, gong.chen@linux.intel.com, vasilis.liaskovitis@profitbricks.com, lwoodman@redhat.com, riel@redhat.com, jweiner@redhat.com, prarit@redhat.com Cc: x86@kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [Part1 PATCH v5 01/22] x86: Change get_ramdisk_{image|size}() to global Date: Thu, 13 Jun 2013 21:02:48 +0800 Message-Id: <1371128589-8953-2-git-send-email-tangchen@cn.fujitsu.com> X-Mailer: git-send-email 1.7.10.1 In-Reply-To: <1371128589-8953-1-git-send-email-tangchen@cn.fujitsu.com> References: <1371128589-8953-1-git-send-email-tangchen@cn.fujitsu.com> X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2013/06/13 20:58:16, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2013/06/13 20:58:24, Serialize complete at 2013/06/13 20:58:24 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yinghai Lu This patch does two things: 1. Change get_ramdisk_image() and get_ramdisk_size() to global. 2. Make get_ramdisk_image() and get_ramdisk_size() take a boot_params pointer parameter. The whole patch-set tries to split ACPI initrd table override procedure into two steps: finding and copying. The finding step is done at head_32.S and head64.c stage. So we need to call get_ramdisk_image() and get_ramdisk_size() in these two files. And also, in head_32.S, it can only access boot_params via physical address during 32bit flat mode, so make get_ramdisk_image() and get_ramdisk_size() take a boot_params pointer, so that we can pass a physical address to code in head_32.S. Signed-off-by: Yinghai Lu Acked-by: Tejun Heo Tested-by: Thomas Renninger Reviewed-by: Tang Chen Tested-by: Tang Chen --- arch/x86/include/asm/setup.h | 3 +++ arch/x86/kernel/setup.c | 28 ++++++++++++++-------------- 2 files changed, 17 insertions(+), 14 deletions(-) diff --git a/arch/x86/include/asm/setup.h b/arch/x86/include/asm/setup.h index b7bf350..4f71d48 100644 --- a/arch/x86/include/asm/setup.h +++ b/arch/x86/include/asm/setup.h @@ -106,6 +106,9 @@ void *extend_brk(size_t size, size_t align); RESERVE_BRK(name, sizeof(type) * entries) extern void probe_roms(void); +u64 get_ramdisk_image(struct boot_params *bp); +u64 get_ramdisk_size(struct boot_params *bp); + #ifdef __i386__ void __init i386_start_kernel(void); diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 56f7fcf..66ab495 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -297,19 +297,19 @@ static void __init reserve_brk(void) #ifdef CONFIG_BLK_DEV_INITRD -static u64 __init get_ramdisk_image(void) +u64 __init get_ramdisk_image(struct boot_params *bp) { - u64 ramdisk_image = boot_params.hdr.ramdisk_image; + u64 ramdisk_image = bp->hdr.ramdisk_image; - ramdisk_image |= (u64)boot_params.ext_ramdisk_image << 32; + ramdisk_image |= (u64)bp->ext_ramdisk_image << 32; return ramdisk_image; } -static u64 __init get_ramdisk_size(void) +u64 __init get_ramdisk_size(struct boot_params *bp) { - u64 ramdisk_size = boot_params.hdr.ramdisk_size; + u64 ramdisk_size = bp->hdr.ramdisk_size; - ramdisk_size |= (u64)boot_params.ext_ramdisk_size << 32; + ramdisk_size |= (u64)bp->ext_ramdisk_size << 32; return ramdisk_size; } @@ -318,8 +318,8 @@ static u64 __init get_ramdisk_size(void) static void __init relocate_initrd(void) { /* Assume only end is not page aligned */ - u64 ramdisk_image = get_ramdisk_image(); - u64 ramdisk_size = get_ramdisk_size(); + u64 ramdisk_image = get_ramdisk_image(&boot_params); + u64 ramdisk_size = get_ramdisk_size(&boot_params); u64 area_size = PAGE_ALIGN(ramdisk_size); u64 ramdisk_here; unsigned long slop, clen, mapaddr; @@ -358,8 +358,8 @@ static void __init relocate_initrd(void) ramdisk_size -= clen; } - ramdisk_image = get_ramdisk_image(); - ramdisk_size = get_ramdisk_size(); + ramdisk_image = get_ramdisk_image(&boot_params); + ramdisk_size = get_ramdisk_size(&boot_params); printk(KERN_INFO "Move RAMDISK from [mem %#010llx-%#010llx] to" " [mem %#010llx-%#010llx]\n", ramdisk_image, ramdisk_image + ramdisk_size - 1, @@ -369,8 +369,8 @@ static void __init relocate_initrd(void) static void __init early_reserve_initrd(void) { /* Assume only end is not page aligned */ - u64 ramdisk_image = get_ramdisk_image(); - u64 ramdisk_size = get_ramdisk_size(); + u64 ramdisk_image = get_ramdisk_image(&boot_params); + u64 ramdisk_size = get_ramdisk_size(&boot_params); u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); if (!boot_params.hdr.type_of_loader || @@ -382,8 +382,8 @@ static void __init early_reserve_initrd(void) static void __init reserve_initrd(void) { /* Assume only end is not page aligned */ - u64 ramdisk_image = get_ramdisk_image(); - u64 ramdisk_size = get_ramdisk_size(); + u64 ramdisk_image = get_ramdisk_image(&boot_params); + u64 ramdisk_size = get_ramdisk_size(&boot_params); u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); u64 mapped_size; -- 1.7.1