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[PATCH] reduce MAX_NR_ZONES: use enum to define zones, reformat and comment

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Use enum for zones and reformat zones dependent information

Add comments explaning the use of zones and add a zones_t type for zone
numbers.

Line up information that will be #ifdefd by the following patches.

[akpm@osdl.org: comment cleanups]
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Christoph Lameter
2006-09-25 23:31:13 -07:00
committed by Linus Torvalds
parent 98d2b0ebda
commit 2f1b624868
3 changed files with 69 additions and 28 deletions
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24
mm/page_alloc.c
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@@ -68,7 +68,11 @@ static void __free_pages_ok(struct page *page, unsigned int order);
* TBD: should special case ZONE_DMA32 machines here - in those we normally
* don't need any ZONE_NORMAL reservation
*/
int sysctl_lowmem_reserve_ratio[MAX_NR_ZONES-1] = { 256, 256, 32 };
int sysctl_lowmem_reserve_ratio[MAX_NR_ZONES-1] = {
256,
256,
32
};
EXPORT_SYMBOL(totalram_pages);
@@ -79,7 +83,13 @@ EXPORT_SYMBOL(totalram_pages);
struct zone *zone_table[1 << ZONETABLE_SHIFT] __read_mostly;
EXPORT_SYMBOL(zone_table);
static char *zone_names[MAX_NR_ZONES] = { "DMA", "DMA32", "Normal", "HighMem" };
static char *zone_names[MAX_NR_ZONES] = {
"DMA",
"DMA32",
"Normal",
"HighMem"
};
int min_free_kbytes = 1024;
unsigned long __meminitdata nr_kernel_pages;
@@ -1487,7 +1497,9 @@ static void __meminit build_zonelists(pg_data_t *pgdat)
static void __meminit build_zonelists(pg_data_t *pgdat)
{
int i, j, k, node, local_node;
int i, node, local_node;
enum zone_type k;
enum zone_type j;
local_node = pgdat->node_id;
for (i = 0; i < GFP_ZONETYPES; i++) {
@@ -1675,8 +1687,8 @@ void zone_init_free_lists(struct pglist_data *pgdat, struct zone *zone,
}
#define ZONETABLE_INDEX(x, zone_nr) ((x << ZONES_SHIFT) | zone_nr)
void zonetable_add(struct zone *zone, int nid, int zid, unsigned long pfn,
unsigned long size)
void zonetable_add(struct zone *zone, int nid, enum zone_type zid,
unsigned long pfn, unsigned long size)
{
unsigned long snum = pfn_to_section_nr(pfn);
unsigned long end = pfn_to_section_nr(pfn + size);
@@ -1960,7 +1972,7 @@ __meminit int init_currently_empty_zone(struct zone *zone,
static void __meminit free_area_init_core(struct pglist_data *pgdat,
unsigned long *zones_size, unsigned long *zholes_size)
{
unsigned long j;
enum zone_type j;
int nid = pgdat->node_id;
unsigned long zone_start_pfn = pgdat->node_start_pfn;
int ret;