From a0140c1d85637ee5f4ea7c78f066e3611a6a79dc Mon Sep 17 00:00:00 2001 From: KAMEZAWA Hiroyuki Date: Mon, 27 Mar 2006 01:15:55 -0800 Subject: [PATCH] remove zone_mem_map This patch removes zone_mem_map. pfn_to_page uses pgdat, page_to_pfn uses zone. page_to_pfn can use pgdat instead of zone, which is only one user of zone_mem_map. By modifing it, we can remove zone_mem_map. Signed-off-by: KAMEZAWA Hiroyuki Cc: Dave Hansen Cc: Christoph Lameter Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/page_alloc.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'mm/page_alloc.c') diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 349b328763b..8dc8f2735d2 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2042,7 +2042,6 @@ static __meminit void init_currently_empty_zone(struct zone *zone, zone_wait_table_init(zone, size); pgdat->nr_zones = zone_idx(zone) + 1; - zone->zone_mem_map = pfn_to_page(zone_start_pfn); zone->zone_start_pfn = zone_start_pfn; memmap_init(size, pgdat->node_id, zone_idx(zone), zone_start_pfn); @@ -2768,9 +2767,8 @@ struct page *pfn_to_page(unsigned long pfn) } unsigned long page_to_pfn(struct page *page) { - struct zone *zone = page_zone(page); - return (page - zone->zone_mem_map) + zone->zone_start_pfn; - + struct pglist_data *pgdat = NODE_DATA(page_to_nid(page)); + return (page - pgdat->node_mem_map) + pgdat->node_start_pfn; } #elif defined(CONFIG_SPARSEMEM) struct page *pfn_to_page(unsigned long pfn) -- cgit v1.2.3-18-g5258