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authorChristoph Lameter <clameter@sgi.com>2006-09-25 23:31:13 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-26 08:48:46 -0700
commit2f1b6248682f8b39ca3c7e549dfc216d26c4109b (patch)
tree2340347d10fd0e564fb8527efe3ffbcb216e1906 /mm/page_alloc.c
parent98d2b0ebda72fc39cdefd3720d50b9b3ce409085 (diff)
downloadop-kernel-dev-2f1b6248682f8b39ca3c7e549dfc216d26c4109b.zip
op-kernel-dev-2f1b6248682f8b39ca3c7e549dfc216d26c4109b.tar.gz
[PATCH] reduce MAX_NR_ZONES: use enum to define zones, reformat and comment
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>
Diffstat (limited to 'mm/page_alloc.c')
-rw-r--r--mm/page_alloc.c24
1 files changed, 18 insertions, 6 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 13c102b..2410a3c 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -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;
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