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swsusp: clean up shrink_all_zones()

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Move local variables to innermost possible scopes and use local
variables to cache calculations/reads done more than once.

No change in functionality (intended).

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Len Brown <lenb@kernel.org>
Cc: Greg KH <gregkh@suse.de>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Johannes Weiner 2009-02-14 02:04:10 +01:00 committed by Linus Torvalds
parent 3049103ddf
commit 0cb57258fe
1 changed files with 11 additions and 12 deletions
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23
mm/vmscan.c
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@ -2057,31 +2057,31 @@ static unsigned long shrink_all_zones(unsigned long nr_pages, int prio,
int pass, struct scan_control *sc)
{
struct zone *zone;
unsigned long nr_to_scan, ret = 0;
enum lru_list l;
unsigned long ret = 0;
for_each_zone(zone) {
enum lru_list l;
if (!populated_zone(zone))
continue;
if (zone_is_all_unreclaimable(zone) && prio != DEF_PRIORITY)
continue;
for_each_evictable_lru(l) {
enum zone_stat_item ls = NR_LRU_BASE + l;
unsigned long lru_pages = zone_page_state(zone, ls);
/* For pass = 0, we don't shrink the active list */
if (pass == 0 &&
(l == LRU_ACTIVE || l == LRU_ACTIVE_FILE))
if (pass == 0 && (l == LRU_ACTIVE_ANON ||
l == LRU_ACTIVE_FILE))
continue;
zone->lru[l].nr_scan +=
(zone_page_state(zone, NR_LRU_BASE + l)
>> prio) + 1;
zone->lru[l].nr_scan += (lru_pages >> prio) + 1;
if (zone->lru[l].nr_scan >= nr_pages || pass > 3) {
unsigned long nr_to_scan;
zone->lru[l].nr_scan = 0;
nr_to_scan = min(nr_pages,
zone_page_state(zone,
NR_LRU_BASE + l));
nr_to_scan = min(nr_pages, lru_pages);
ret += shrink_list(l, nr_to_scan, zone,
sc, prio);
if (ret >= nr_pages)
@ -2089,7 +2089,6 @@ static unsigned long shrink_all_zones(unsigned long nr_pages, int prio,
}
}
}
return ret;
}