There are numerous places we check whether a zone is populated or not.
Provide a helper function to check for populated zones and convert
all checks for zone->present_pages.
Signed-off-by: Con Kolivas <[email protected]>
include/linux/mmzone.h | 5 +++++
mm/mempolicy.c | 2 +-
mm/page_alloc.c | 16 ++++++++--------
mm/swap_prefetch.c | 4 ++--
mm/vmscan.c | 8 ++++----
5 files changed, 20 insertions(+), 15 deletions(-)
---
Index: linux-2.6.14-mm2/include/linux/mmzone.h
===================================================================
--- linux-2.6.14-mm2.orig/include/linux/mmzone.h
+++ linux-2.6.14-mm2/include/linux/mmzone.h
@@ -400,6 +400,11 @@ static inline struct zone *next_zone(str
#define for_each_zone(zone) \
for (zone = pgdat_list->node_zones; zone; zone = next_zone(zone))
+static inline int populated_zone(struct zone *zone)
+{
+ return (!!zone->present_pages);
+}
+
static inline int is_highmem_idx(int idx)
{
return (idx == ZONE_HIGHMEM);
Index: linux-2.6.14-mm2/mm/mempolicy.c
===================================================================
--- linux-2.6.14-mm2.orig/mm/mempolicy.c
+++ linux-2.6.14-mm2/mm/mempolicy.c
@@ -139,7 +139,7 @@ static struct zonelist *bind_zonelist(no
int k;
for (k = MAX_NR_ZONES-1; k >= 0; k--) {
struct zone *z = &NODE_DATA(nd)->node_zones[k];
- if (!z->present_pages)
+ if (!populated_zone(z))
continue;
zl->zones[num++] = z;
if (k > policy_zone)
Index: linux-2.6.14-mm2/mm/page_alloc.c
===================================================================
--- linux-2.6.14-mm2.orig/mm/page_alloc.c
+++ linux-2.6.14-mm2/mm/page_alloc.c
@@ -1372,7 +1372,7 @@ void show_free_areas(void)
show_node(zone);
printk("%s per-cpu:", zone->name);
- if (!zone->present_pages) {
+ if (!populated_zone(zone)) {
printk(" empty\n");
continue;
} else
@@ -1450,7 +1450,7 @@ void show_free_areas(void)
show_node(zone);
printk("%s: ", zone->name);
- if (!zone->present_pages) {
+ if (!populated_zone(zone)) {
printk("empty\n");
continue;
}
@@ -1479,7 +1479,7 @@ static int __init build_zonelists_node(p
BUG();
case ZONE_HIGHMEM:
zone = pgdat->node_zones + ZONE_HIGHMEM;
- if (zone->present_pages) {
+ if (populated_zone(zone)) {
#ifndef CONFIG_HIGHMEM
BUG();
#endif
@@ -1487,15 +1487,15 @@ static int __init build_zonelists_node(p
}
case ZONE_NORMAL:
zone = pgdat->node_zones + ZONE_NORMAL;
- if (zone->present_pages)
+ if (populated_zone(zone))
zonelist->zones[j++] = zone;
case ZONE_DMA32:
zone = pgdat->node_zones + ZONE_DMA32;
- if (zone->present_pages)
+ if (populated_zone(zone))
zonelist->zones[j++] = zone;
case ZONE_DMA:
zone = pgdat->node_zones + ZONE_DMA;
- if (zone->present_pages)
+ if (populated_zone(zone))
zonelist->zones[j++] = zone;
}
@@ -2156,7 +2156,7 @@ static int frag_show(struct seq_file *m,
int order;
for (zone = node_zones; zone - node_zones < MAX_NR_ZONES; ++zone) {
- if (!zone->present_pages)
+ if (!populated_zone(zone))
continue;
spin_lock_irqsave(&zone->lock, flags);
@@ -2189,7 +2189,7 @@ static int zoneinfo_show(struct seq_file
for (zone = node_zones; zone - node_zones < MAX_NR_ZONES; zone++) {
int i;
- if (!zone->present_pages)
+ if (!populated_zone(zone))
continue;
spin_lock_irqsave(&zone->lock, flags);
Index: linux-2.6.14-mm2/mm/swap_prefetch.c
===================================================================
--- linux-2.6.14-mm2.orig/mm/swap_prefetch.c
+++ linux-2.6.14-mm2/mm/swap_prefetch.c
@@ -176,7 +176,7 @@ static struct page *prefetch_get_page(vo
for_each_zone(z) {
long free;
- if (z->present_pages == 0)
+ if (!populated_zone(z))
continue;
/* We don't prefetch into DMA */
@@ -291,7 +291,7 @@ static int prefetch_suitable(void)
for_each_zone(z) {
unsigned long free;
- if (z->present_pages == 0)
+ if (!populated_zone(z))
continue;
free = z->free_pages;
if (z->pages_high * 3 > free)
Index: linux-2.6.14-mm2/mm/vmscan.c
===================================================================
--- linux-2.6.14-mm2.orig/mm/vmscan.c
+++ linux-2.6.14-mm2/mm/vmscan.c
@@ -1122,7 +1122,7 @@ shrink_caches(struct zone **zones, struc
for (i = 0; zones[i] != NULL; i++) {
struct zone *zone = zones[i];
- if (zone->present_pages == 0)
+ if (!populated_zone(zone))
continue;
if (!cpuset_zone_allowed(zone, __GFP_HARDWALL))
@@ -1292,7 +1292,7 @@ loop_again:
for (i = pgdat->nr_zones - 1; i >= 0; i--) {
struct zone *zone = pgdat->node_zones + i;
- if (zone->present_pages == 0)
+ if (!populated_zone(zone))
continue;
if (zone->all_unreclaimable &&
@@ -1329,7 +1329,7 @@ scan:
struct zone *zone = pgdat->node_zones + i;
int nr_slab;
- if (zone->present_pages == 0)
+ if (!populated_zone(zone))
continue;
if (zone->all_unreclaimable && priority != DEF_PRIORITY)
@@ -1481,7 +1481,7 @@ void wakeup_kswapd(struct zone *zone, in
{
pg_data_t *pgdat;
- if (zone->present_pages == 0)
+ if (!populated_zone(zone))
return;
pgdat = zone->zone_pgdat;
-
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