From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx143.postini.com [74.125.245.143]) by kanga.kvack.org (Postfix) with SMTP id 40C966B0031 for ; Mon, 17 Jun 2013 17:04:32 -0400 (EDT) Received: by mail-qc0-f172.google.com with SMTP id j10so1870700qcx.17 for ; Mon, 17 Jun 2013 14:04:31 -0700 (PDT) Date: Mon, 17 Jun 2013 14:04:22 -0700 From: Tejun Heo Subject: Re: [Part1 PATCH v5 03/22] x86, ACPI, mm: Kill max_low_pfn_mapped Message-ID: <20130617210422.GN32663@mtj.dyndns.org> References: <1371128589-8953-1-git-send-email-tangchen@cn.fujitsu.com> <1371128589-8953-4-git-send-email-tangchen@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1371128589-8953-4-git-send-email-tangchen@cn.fujitsu.com> Sender: owner-linux-mm@kvack.org List-ID: To: Tang Chen Cc: tglx@linutronix.de, mingo@elte.hu, hpa@zytor.com, akpm@linux-foundation.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, x86@kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, "Rafael J. Wysocki" , Jacob Shin , Pekka Enberg , linux-acpi@vger.kernel.org Hello, On Thu, Jun 13, 2013 at 09:02:50PM +0800, Tang Chen wrote: > From: Yinghai Lu > > Now we have pfn_mapped[] array, and max_low_pfn_mapped should not > be used anymore. Users should use pfn_mapped[] or just > 1UL<<(32-PAGE_SHIFT) instead. > > The only user of max_low_pfn_mapped is ACPI_INITRD_TABLE_OVERRIDE. > We could change to use 1U<<(32_PAGE_SHIFT) with it, aka under 4G. ^ typo ... > diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c > index e721863..93e3194 100644 > --- a/drivers/acpi/osl.c > +++ b/drivers/acpi/osl.c > @@ -624,9 +624,9 @@ void __init acpi_initrd_override(void *data, size_t size) > if (table_nr == 0) > return; > > - acpi_tables_addr = > - memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT, > - all_tables_size, PAGE_SIZE); > + /* under 4G at first, then above 4G */ > + acpi_tables_addr = memblock_find_in_range(0, (1ULL<<32) - 1, > + all_tables_size, PAGE_SIZE); No bigge, but why (1ULL << 32) - 1? Shouldn't it be just 1ULL << 32? memblock deals with [@start, @end) areas, right? Other than that, Acked-by: Tejun Heo Thanks. -- tejun -- 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