mm: add & use zone_end_pfn() and zone_spans_pfn()

[~andy/linux] / mm / compaction.c

diff --git a/mm/compaction.c b/mm/compaction.c
index 25e75e3e2ac6ed08bfd5b764ef684565cd124dac..05ccb4cc0bdb984dc2613461703587ec199804cd 100644 (file)
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -86,7 +86,7 @@ static inline bool isolation_suitable(struct compact_control *cc,
 static void __reset_isolation_suitable(struct zone *zone)
 {
        unsigned long start_pfn = zone->zone_start_pfn;
-       unsigned long end_pfn = zone->zone_start_pfn + zone->spanned_pages;
+       unsigned long end_pfn = zone_end_pfn(zone);
        unsigned long pfn;
 
        zone->compact_cached_migrate_pfn = start_pfn;
@@ -647,7 +647,7 @@ static void isolate_freepages(struct zone *zone,
                                struct compact_control *cc)
 {
        struct page *page;
-       unsigned long high_pfn, low_pfn, pfn, zone_end_pfn, end_pfn;
+       unsigned long high_pfn, low_pfn, pfn, z_end_pfn, end_pfn;
        int nr_freepages = cc->nr_freepages;
        struct list_head *freelist = &cc->freepages;
 
@@ -666,7 +666,7 @@ static void isolate_freepages(struct zone *zone,
         */
        high_pfn = min(low_pfn, pfn);
 
-       zone_end_pfn = zone->zone_start_pfn + zone->spanned_pages;
+       z_end_pfn = zone_end_pfn(zone);
 
        /*
         * Isolate free pages until enough are available to migrate the
@@ -709,7 +709,7 @@ static void isolate_freepages(struct zone *zone,
                 * only scans within a pageblock
                 */
                end_pfn = ALIGN(pfn + 1, pageblock_nr_pages);
-               end_pfn = min(end_pfn, zone_end_pfn);
+               end_pfn = min(end_pfn, z_end_pfn);
                isolated = isolate_freepages_block(cc, pfn, end_pfn,
                                                   freelist, false);
                nr_freepages += isolated;
@@ -923,7 +923,7 @@ static int compact_zone(struct zone *zone, struct compact_control *cc)
 {
        int ret;
        unsigned long start_pfn = zone->zone_start_pfn;
-       unsigned long end_pfn = zone->zone_start_pfn + zone->spanned_pages;
+       unsigned long end_pfn = zone_end_pfn(zone);
 
        ret = compaction_suitable(zone, cc->order);
        switch (ret) {