1 files changed, 8 insertions, 27 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index c957805a7f0e..df2022ff0c8a 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1384,14 +1384,8 @@ void split_page(struct page *page, unsigned int order)
                 set_page_refcounted(page + i);
 }
 
-/*
- * Similar to the split_page family of functions except that the page
- * required at the given order and being isolated now to prevent races
- * with parallel allocators
- */
-int capture_free_page(struct page *page, int alloc_order, int migratetype)
+static int __isolate_free_page(struct page *page, unsigned int order)
 {
-        unsigned int order;
         unsigned long watermark;
         struct zone *zone;
         int mt;
@@ -1399,7 +1393,6 @@ int capture_free_page(struct page *page, int alloc_order, int migratetype)
         BUG_ON(!PageBuddy(page));
 
         zone = page_zone(page);
-        order = page_order(page);
         mt = get_pageblock_migratetype(page);
 
         if (mt != MIGRATE_ISOLATE) {
@@ -1408,7 +1401,7 @@ int capture_free_page(struct page *page, int alloc_order, int migratetype)
                 if (!zone_watermark_ok(zone, 0, watermark, 0, 0))
                         return 0;
 
-                __mod_zone_freepage_state(zone, -(1UL << alloc_order), mt);
+                __mod_zone_freepage_state(zone, -(1UL << order), mt);
         }
 
         /* Remove page from free list */
@@ -1416,11 +1409,7 @@ int capture_free_page(struct page *page, int alloc_order, int migratetype)
         zone->free_area[order].nr_free--;
         rmv_page_order(page);
 
-        if (alloc_order != order)
-                expand(zone, page, alloc_order, order,
-                        &zone->free_area[order], migratetype);
-
-        /* Set the pageblock if the captured page is at least a pageblock */
+        /* Set the pageblock if the isolated page is at least a pageblock */
         if (order >= pageblock_order - 1) {
                 struct page *endpage = page + (1 << order) - 1;
                 for (; page < endpage; page += pageblock_nr_pages) {
@@ -1431,7 +1420,7 @@ int capture_free_page(struct page *page, int alloc_order, int migratetype)
                 }
         }
 
-        return 1UL << alloc_order;
+        return 1UL << order;
 }
 
 /*
@@ -1449,10 +1438,9 @@ int split_free_page(struct page *page)
         unsigned int order;
         int nr_pages;
 
-        BUG_ON(!PageBuddy(page));
         order = page_order(page);
 
-        nr_pages = capture_free_page(page, order, 0);
+        nr_pages = __isolate_free_page(page, order);
         if (!nr_pages)
                 return 0;
 
@@ -2136,8 +2124,6 @@ __alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order,
         bool *contended_compaction, bool *deferred_compaction,
         unsigned long *did_some_progress)
 {
-        struct page *page = NULL;
-
         if (!order)
                 return NULL;
 
@@ -2149,16 +2135,12 @@ __alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order,
         current->flags |= PF_MEMALLOC;
         *did_some_progress = try_to_compact_pages(zonelist, order, gfp_mask,
                                                 nodemask, sync_migration,
-                                                contended_compaction, &page);
+                                                contended_compaction);
         current->flags &= ~PF_MEMALLOC;
 
-        /* If compaction captured a page, prep and use it */
-        if (page) {
-                prep_new_page(page, order, gfp_mask);
-                goto got_page;
-        }
-
         if (*did_some_progress != COMPACT_SKIPPED) {
+                struct page *page;
+
                 /* Page migration frees to the PCP lists but we want merging */
                 drain_pages(get_cpu());
                 put_cpu();
@@ -2168,7 +2150,6 @@ __alloc_pages_direct_compact(gfp_t gfp_mask, unsigned int order,
                                 alloc_flags & ~ALLOC_NO_WATERMARKS,
                                 preferred_zone, migratetype);
                 if (page) {
-got_page:
                         preferred_zone->compact_blockskip_flush = false;
                         preferred_zone->compact_considered = 0;
                         preferred_zone->compact_defer_shift = 0;