Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756095Ab3EYNZw (ORCPT ); Sat, 25 May 2013 09:25:52 -0400 Received: from mail-oa0-f46.google.com ([209.85.219.46]:55361 "EHLO mail-oa0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754372Ab3EYNZs (ORCPT ); Sat, 25 May 2013 09:25:48 -0400 MIME-Version: 1.0 In-Reply-To: <1368028298-7401-17-git-send-email-jiang.liu@huawei.com> References: <1368028298-7401-1-git-send-email-jiang.liu@huawei.com> <1368028298-7401-17-git-send-email-jiang.liu@huawei.com> Date: Sat, 25 May 2013 21:25:47 +0800 Message-ID: Subject: Re: [PATCH v5, part4 16/41] mm/blackfin: prepare for removing num_physpages and simplify mem_init() From: Sonic Zhang To: Jiang Liu Cc: Andrew Morton , Jiang Liu , David Rientjes , Wen Congyang , Mel Gorman , Minchan Kim , KAMEZAWA Hiroyuki , Michal Hocko , James Bottomley , Sergei Shtylyov , David Howells , Mark Salter , Jianguo Wu , linux-mm@kvack.org, linux-arch@vger.kernel.org, Linux Kernel , Mike Frysinger , Bob Liu , uclinux-dist-devel Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3027 Lines: 75 Hi Jiang On Wed, May 8, 2013 at 11:51 PM, Jiang Liu wrote: > Prepare for removing num_physpages and simplify mem_init(). > > Signed-off-by: Jiang Liu > Cc: Mike Frysinger > Cc: Bob Liu > Cc: uclinux-dist-devel@blackfin.uclinux.org > Cc: linux-kernel@vger.kernel.org > --- > arch/blackfin/mm/init.c | 38 ++++++-------------------------------- > 1 file changed, 6 insertions(+), 32 deletions(-) > > diff --git a/arch/blackfin/mm/init.c b/arch/blackfin/mm/init.c > index 1cc8607..e4b6e11 100644 > --- a/arch/blackfin/mm/init.c > +++ b/arch/blackfin/mm/init.c > @@ -90,43 +90,17 @@ asmlinkage void __init init_pda(void) > > void __init mem_init(void) > { > - unsigned int codek = 0, datak = 0, initk = 0; > - unsigned int reservedpages = 0, freepages = 0; > - unsigned long tmp; > - unsigned long start_mem = memory_start; > - unsigned long end_mem = memory_end; > + char buf[64]; > > - end_mem &= PAGE_MASK; > - high_memory = (void *)end_mem; > - > - start_mem = PAGE_ALIGN(start_mem); > - max_mapnr = num_physpages = MAP_NR(high_memory); > - printk(KERN_DEBUG "Kernel managed physical pages: %lu\n", num_physpages); > + high_memory = (void *)(memory_end & PAGE_MASK); > + max_mapnr = MAP_NR(high_memory); > + printk(KERN_DEBUG "Kernel managed physical pages: %lu\n", max_mapnr); > > /* This will put all low memory onto the freelists. */ > free_all_bootmem(); > > - reservedpages = 0; > - for (tmp = ARCH_PFN_OFFSET; tmp < max_mapnr; tmp++) > - if (PageReserved(pfn_to_page(tmp))) > - reservedpages++; > - freepages = max_mapnr - ARCH_PFN_OFFSET - reservedpages; > - > - /* do not count in kernel image between _rambase and _ramstart */ > - reservedpages -= (_ramstart - _rambase) >> PAGE_SHIFT; > -#if (defined(CONFIG_BFIN_EXTMEM_ICACHEABLE) && ANOMALY_05000263) > - reservedpages += (_ramend - memory_end - DMA_UNCACHED_REGION) >> PAGE_SHIFT; > -#endif > - > - codek = (_etext - _stext) >> 10; > - initk = (__init_end - __init_begin) >> 10; > - datak = ((_ramstart - _rambase) >> 10) - codek - initk; > - > - printk(KERN_INFO > - "Memory available: %luk/%luk RAM, " > - "(%uk init code, %uk kernel code, %uk data, %uk dma, %uk reserved)\n", > - (unsigned long) freepages << (PAGE_SHIFT-10), (_ramend - CONFIG_PHY_RAM_BASE_ADDRESS) >> 10, > - initk, codek, datak, DMA_UNCACHED_REGION >> 10, (reservedpages << (PAGE_SHIFT-10))); You can't remove all these memory information for blackfin. They are useful on blackfin platform. Regards, Sonic -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/