linux-kernel - [RFC PATCH v2, part4 13/39] mm/blackfin: prepare for removing num_physpages and simplify mem

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Message-Id: <1364109934-7851-19-git-send-email-jiang.liu@huawei.com>
Date:	Sun, 24 Mar 2013 15:24:44 +0800
From:	Jiang Liu <liuj97@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>
Cc:	Jiang Liu <jiang.liu@...wei.com>,
	Wen Congyang <wency@...fujitsu.com>,
	Mel Gorman <mgorman@...e.de>, Minchan Kim <minchan@...nel.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Michal Hocko <mhocko@...e.cz>,
	Jianguo Wu <wujianguo@...wei.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Mike Frysinger <vapier@...too.org>,
	Bob Liu <lliubbo@...il.com>,
	uclinux-dist-devel@...ckfin.uclinux.org
Subject: [RFC PATCH v2, part4 13/39] mm/blackfin: prepare for removing num_physpages and simplify mem_init()

Prepare for removing num_physpages and simplify mem_init().

Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
Cc: Mike Frysinger <vapier@...too.org>
Cc: Bob Liu <lliubbo@...il.com>
Cc: uclinux-dist-devel@...ckfin.uclinux.org
Cc: linux-kernel@...r.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)));
+	snprintf(buf, sizeof(buf) - 1, "%uK DMA", DMA_UNCACHED_REGION >> 10);
+	mem_init_print_info(buf);
 }
 
 #ifdef CONFIG_BLK_DEV_INITRD
-- 
1.7.9.5

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