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| author | KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> | 2006-03-27 01:15:55 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-27 08:44:47 -0800 |
| commit | a0140c1d85637ee5f4ea7c78f066e3611a6a79dc (patch) | |
| tree | 7a52892e57ff7a97a3aabf920891b68ca8bf578a /mm | |
| parent | 0ecd702bcb924d5fb7f687e09986f688336ac896 (diff) | |
| download | lwn-a0140c1d85637ee5f4ea7c78f066e3611a6a79dc.tar.gz lwn-a0140c1d85637ee5f4ea7c78f066e3611a6a79dc.zip | |
[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 <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: Christoph Lameter <christoph@lameter.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/page_alloc.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 349b328763b7..8dc8f2735d22 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) |