pearing off zone from physical memory layout [1/10] remove zone_mem_map

RFC New KAMEZAWA Hiroyuki 1 participant 1 message Feb 3, 2006

Subsystems (4)

Memory management MM core Page allocator MGLRU

lore

Share & tools

lore

KAMEZAWA Hiroyuki

author

2006-02-03 07:37 UTC #0 lore raw

RFC 1/1 pearing off zone from physical memory layout [1/10] remove zone_mem_map

This patch removes zone->zone_mem_map.

Because of SPARSEMEM's cleanup, there are no codes which touches zone->zone_mem_map directly.

This patch affects many archs which has NUMA, so enough tests should be done. But I don't have test environments...
Please notify me if the kernel cannot be compiled because of this patch. Sigh, binary modules which uses page_to_pfn() will not work either ;)

Signed-off-by KAMEZAWA Hiroyuki <[email protected]>

include/linux/mmzone.h +0 -1

Index: hogehoge/include/linux/mmzone.h
===================================================================
@@ -212,7 +212,6 @@ struct zone {
 	 * Discontig memory support fields.
 	 */
 	struct pglist_data	*zone_pgdat;
-	struct page		*zone_mem_map;
 	/* zone_start_pfn == zone_start_paddr >> PAGE_SHIFT */
 	unsigned long		zone_start_pfn;

mm/page_alloc.c +0 -1

Index: hogehoge/mm/page_alloc.c
===================================================================
@@ -2009,7 +2009,6 @@ static __meminit void init_currently_emp
 	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);

--
To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to [email protected]. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"[email protected]"> [email protected] </a>