linux-kernel - [RFC PATCH v2, part4 20/39] mm/IA64: prepare for removing num_physpages and simplify mem

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Message-Id: <1364109934-7851-32-git-send-email-jiang.liu@huawei.com>
Date:	Sun, 24 Mar 2013 15:24:57 +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, Tony Luck <tony.luck@...el.com>,
	Fenghua Yu <fenghua.yu@...el.com>,
	Zhang Yanfei <zhangyanfei@...fujitsu.com>,
	linux-ia64@...r.kernel.org
Subject: [RFC PATCH v2, part4 20/39] mm/IA64: 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: Tony Luck <tony.luck@...el.com>
Cc: Fenghua Yu <fenghua.yu@...el.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Zhang Yanfei <zhangyanfei@...fujitsu.com>
Cc: linux-ia64@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
---
 arch/ia64/mm/contig.c    |   11 -----------
 arch/ia64/mm/discontig.c |    3 ---
 arch/ia64/mm/init.c      |   27 +--------------------------
 3 files changed, 1 insertion(+), 40 deletions(-)

diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c
index 67c59eb..e4a6a536 100644
--- a/arch/ia64/mm/contig.c
+++ b/arch/ia64/mm/contig.c
@@ -295,14 +295,6 @@ find_memory (void)
 	alloc_per_cpu_data();
 }
 
-static int count_pages(u64 start, u64 end, void *arg)
-{
-	unsigned long *count = arg;
-
-	*count += (end - start) >> PAGE_SHIFT;
-	return 0;
-}
-
 /*
  * Set up the page tables.
  */
@@ -313,9 +305,6 @@ paging_init (void)
 	unsigned long max_dma;
 	unsigned long max_zone_pfns[MAX_NR_ZONES];
 
-	num_physpages = 0;
-	efi_memmap_walk(count_pages, &num_physpages);
-
 	memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
 #ifdef CONFIG_ZONE_DMA
 	max_dma = virt_to_phys((void *) MAX_DMA_ADDRESS) >> PAGE_SHIFT;
diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c
index a57436e..8febadc 100644
--- a/arch/ia64/mm/discontig.c
+++ b/arch/ia64/mm/discontig.c
@@ -37,7 +37,6 @@ struct early_node_data {
 	struct ia64_node_data *node_data;
 	unsigned long pernode_addr;
 	unsigned long pernode_size;
-	unsigned long num_physpages;
 #ifdef CONFIG_ZONE_DMA
 	unsigned long num_dma_physpages;
 #endif
@@ -732,7 +731,6 @@ static __init int count_node_pages(unsigned long start, unsigned long len, int n
 {
 	unsigned long end = start + len;
 
-	mem_data[node].num_physpages += len >> PAGE_SHIFT;
 #ifdef CONFIG_ZONE_DMA
 	if (start <= __pa(MAX_DMA_ADDRESS))
 		mem_data[node].num_dma_physpages +=
@@ -778,7 +776,6 @@ void __init paging_init(void)
 #endif
 
 	for_each_online_node(node) {
-		num_physpages += mem_data[node].num_physpages;
 		pfn_offset = mem_data[node].min_pfn;
 
 #ifdef CONFIG_VIRTUAL_MEM_MAP
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index b5b71e8..d4382dc 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -546,19 +546,6 @@ int __init register_active_ranges(u64 start, u64 len, int nid)
 	return 0;
 }
 
-static int __init
-count_reserved_pages(u64 start, u64 end, void *arg)
-{
-	unsigned long num_reserved = 0;
-	unsigned long *count = arg;
-
-	for (; start < end; start += PAGE_SIZE)
-		if (PageReserved(virt_to_page(start)))
-			++num_reserved;
-	*count += num_reserved;
-	return 0;
-}
-
 int
 find_max_min_low_pfn (u64 start, u64 end, void *arg)
 {
@@ -597,7 +584,6 @@ __setup("nolwsys", nolwsys_setup);
 void __init
 mem_init (void)
 {
-	long reserved_pages, codesize, datasize, initsize;
 	pg_data_t *pgdat;
 	int i;
 
@@ -625,18 +611,7 @@ mem_init (void)
 		if (pgdat->bdata->node_bootmem_map)
 			free_all_bootmem_node(pgdat);
 
-	reserved_pages = 0;
-	efi_memmap_walk(count_reserved_pages, &reserved_pages);
-
-	codesize =  (unsigned long) _etext - (unsigned long) _stext;
-	datasize =  (unsigned long) _edata - (unsigned long) _etext;
-	initsize =  (unsigned long) __init_end - (unsigned long) __init_begin;
-
-	printk(KERN_INFO "Memory: %luk/%luk available (%luk code, %luk reserved, "
-	       "%luk data, %luk init)\n", nr_free_pages() << (PAGE_SHIFT - 10),
-	       num_physpages << (PAGE_SHIFT - 10), codesize >> 10,
-	       reserved_pages << (PAGE_SHIFT - 10), datasize >> 10, initsize >> 10);
-
+	mem_init_print_info(NULL);
 
 	/*
 	 * For fsyscall entrpoints with no light-weight handler, use the ordinary
-- 
1.7.9.5

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