From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx150.postini.com [74.125.245.150]) by kanga.kvack.org (Postfix) with SMTP id 917066B004D for ; Tue, 27 Aug 2013 05:39:17 -0400 (EDT) From: Tang Chen Subject: [PATCH 08/11] x86, acpi, memblock: Use __memblock_alloc_base() in acpi_initrd_override() Date: Tue, 27 Aug 2013 17:37:45 +0800 Message-Id: <1377596268-31552-9-git-send-email-tangchen@cn.fujitsu.com> In-Reply-To: <1377596268-31552-1-git-send-email-tangchen@cn.fujitsu.com> References: <1377596268-31552-1-git-send-email-tangchen@cn.fujitsu.com> Sender: owner-linux-mm@kvack.org List-ID: To: rjw@sisk.pl, lenb@kernel.org, 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, izumi.taku@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, zhangyanfei@cn.fujitsu.com Cc: x86@kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-acpi@vger.kernel.org The current acpi_initrd_override() calls memblock_find_in_range() to allocate memory, and pass 0 to %start, which will not limited by the current_limit_low. acpi_initrd_override() |->memblock_find_in_range(0, ...) |->memblock_find_in_range_node(0, ...) When we want to allocate memory from the end of kernel image to higher memory, we need to limit the lowest address to the end of kernel image. We have modified memblock_alloc_base_nid() to call memblock_find_in_range_node() with %start = MEMBLOCK_ALLOC_ACCESSIBLE, which means it will be limited by current_limit_low. And __memblock_alloc_base() calls memblock_alloc_base_nid(). __memblock_alloc_base() |->memblock_alloc_base_nid() |->memblock_find_in_range_node(MEMBLOCK_ALLOC_ACCESSIBLE, ...) So use __memblock_alloc_base() to allocate memory in acpi_initrd_override(). Signed-off-by: Tang Chen Reviewed-by: Zhang Yanfei --- drivers/acpi/osl.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index fece767..1d68fc0 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -629,8 +629,8 @@ void __init acpi_initrd_override(void *data, size_t size) return; /* under 4G at first, then above 4G */ - acpi_tables_addr = memblock_find_in_range(0, (1ULL<<32) - 1, - all_tables_size, PAGE_SIZE); + acpi_tables_addr = __memblock_alloc_base(all_tables_size, + PAGE_SIZE, (1ULL<<32) - 1); if (!acpi_tables_addr) { WARN_ON(1); return; -- 1.7.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org