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[PATCH] mm: add populated_zone() helper

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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 <kernel@kolivas.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Con Kolivas
2006-01-06 00:11:15 -08:00
committed by Linus Torvalds
parent 80bfed904c
commit f3fe65122d
3 changed files with 13 additions and 8 deletions
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8
mm/vmscan.c
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@@ -897,7 +897,7 @@ shrink_caches(struct zone **zones, struct scan_control *sc)
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))
@@ -1069,7 +1069,7 @@ 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 &&
@@ -1106,7 +1106,7 @@ 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)
@@ -1258,7 +1258,7 @@ void wakeup_kswapd(struct zone *zone, int order)
{
pg_data_t *pgdat;
if (zone->present_pages == 0)
if (!populated_zone(zone))
return;
pgdat = zone->zone_pgdat;