mm/memory_hotplug: use helper zone_is_zone_device() to simplify the code

[mirror_ubuntu-kernels.git] / mm / compaction.c

diff --git a/mm/compaction.c b/mm/compaction.c
index 621508e0ecd5da3c4b82ea8d69832375c1bb3e50..ed37e1cb4369e6bec3496300da10901b483b4b93 100644 (file)
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -306,16 +306,14 @@ __reset_isolation_pfn(struct zone *zone, unsigned long pfn, bool check_source,
         * is necessary for the block to be a migration source/target.
         */
        do {
-               if (pfn_valid_within(pfn)) {
-                       if (check_source && PageLRU(page)) {
-                               clear_pageblock_skip(page);
-                               return true;
-                       }
+               if (check_source && PageLRU(page)) {
+                       clear_pageblock_skip(page);
+                       return true;
+               }
 
-                       if (check_target && PageBuddy(page)) {
-                               clear_pageblock_skip(page);
-                               return true;
-                       }
+               if (check_target && PageBuddy(page)) {
+                       clear_pageblock_skip(page);
+                       return true;
                }
 
                page += (1 << PAGE_ALLOC_COSTLY_ORDER);
@@ -585,8 +583,6 @@ static unsigned long isolate_freepages_block(struct compact_control *cc,
                        break;
 
                nr_scanned++;
-               if (!pfn_valid_within(blockpfn))
-                       goto isolate_fail;
 
                /*
                 * For compound pages such as THP and hugetlbfs, we can save
@@ -885,8 +881,6 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,
                        cond_resched();
                }
 
-               if (!pfn_valid_within(low_pfn))
-                       goto isolate_fail;
                nr_scanned++;
 
                page = pfn_to_page(low_pfn);